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As a core component of the environmental protection system in asphalt mixing plants, the filtration performance of dust collector bags directly affects the compliant operation of the equipment and the achievement of environmental emission standards.  Asian Construction Equipment Group Co., Ltd. (abbreviated as​ ACE Group), specializing in the research, development, and maintenance services of environmental protection equipment for asphalt mixing plants, has developed this standardized replacement guide based on years of practical engineering experience. This guide strictly adheres to industrial safety regulations and environmental protection requirements, detailing the entire process and key operational points for replacing dust collector bags.  Its aim is to provide relevant maintenance personnel with professional, safe, and efficient practical guidance, ensuring the stable operation of the dust collection system, extending equipment lifespan, and helping mixing plants achieve green production.

I. Preliminary Preparations (Safety and Basic Security Phase)

1. Shutdown, power outage, and safety precautions

Before performing any maintenance work, a strict shutdown and lockout procedure must be followed: first, shut down the asphalt mixing plant step by step according to the operating procedures. After the main unit and dust removal system have completely stopped, disconnect the main power supply to the dust collector, fan, and other related equipment, and hang a “Under Maintenance, Do Not Energize” safety warning sign to prevent accidental startup and potential accidents. Operators must wear complete protective equipment according to regulations, including anti-static work clothes, dust-resistant gloves, impact-resistant safety glasses, and a dust mask (KN95 or higher level is recommended) to prevent dust inhalation and mechanical injuries.

2. Site cleanup

Thoroughly clean the exterior of the dust collector casing, the area around the manhole door, and the work area, removing debris, accumulated dust, and unrelated tools to ensure unobstructed access.  During the cleaning process, high-pressure air blowing can be used in conjunction with brooms and rags.  Special attention should be paid to cleaning dust and debris from the sealing surface of the manhole door to prevent contaminants from falling into the dust collector during replacement, which could affect subsequent sealing performance and bag filter efficiency.

3. Inspection of the main structure of the dust collector

A comprehensive inspection should be conducted on key structural components such as the dust collector casing, tube sheet, suspension brackets, and pulse jet cleaning system: check the casing for deformation, weld cracks, or corrosion and leakage; specifically verify the flatness of the tube sheet (allowable deviation ≤2mm/m), ensuring that the edges of the tube sheet holes are free of burrs, cracks, and deformation to prevent dust leakage due to poor contact between the filter bags and the tube sheet after installation; check the stability of the suspension brackets, and if there is any looseness or corrosion, reinforce or replace them promptly to ensure the stability of the filter bag suspension.

4. Selection and pretreatment of new filter bags

Based on the flue gas temperature, dust characteristics (dust concentration, particle size), and operating conditions of the asphalt mixing plant, select dust collector filter bags of suitable material and specifications (high-temperature and acid-alkali resistant FMS or PTFE composite filter materials are recommended, suitable for temperatures ≤260℃).  New filter bags must have a product qualification certificate and be inspected individually before installation to ensure there are no defects such as damage, holes, or loose threads, and that the filter bag expansion rings have good elasticity. During the pre-treatment stage, place the new filter bags in a clean and well-ventilated environment for more than 24 hours to eliminate packaging odors and moisture generated during transportation and storage, thus avoiding any impact on filtration performance.

5. Preparation of specialized tools

Prepare a complete set of specialized tools, including: a torque wrench (matching the clamp bolt specifications), Phillips/flathead screwdrivers, a special bag removal tool, non-slip ropes (with a load capacity of ≥50kg), a copper brush (to avoid scratching the panel), sealing strips (for backup), cleaning cloths, and a dedicated storage bag for used bags.  All tools must be checked for proper working condition in advance and arranged in an orderly manner to ensure efficient replacement work.

II. Core Replacement Steps (Precise Operation Phase)

1. Remove the old cloth bag.

After opening the dust collector’s access door, ventilate the area for 15-30 minutes to reduce the internal dust concentration. When entering the interior for work, a safety harness must be worn, and a designated person must be present for supervision.The removal process depends on the bag’s fixing method: For clamp-type fixing, use a torque wrench to loosen the clamp bolts, remove the clamp, and then grasp the top of the filter bag and pull it vertically upwards to detach the bag’s retaining ring from the tube sheet hole; for tie-down type fixing, use bag removal pliers to untie the binding ropes, taking care to avoid leaving any rope fragments behind.If the manhole opening is too narrow to remove the filter bag in one piece, the “upper binding and sectional cutting” method can be used: first, secure the upper part of the filter bag with a rope, pull out one-third of its length through the manhole opening, and then cut it horizontally from the bottom using a special tool. Remove the bag in sections to avoid damaging the tube sheet and adjacent components during the pulling process. The removed old filter bags must be immediately placed in sealed storage bags to prevent dust dispersion and then disposed of according to hazardous waste treatment regulations.

2. Cleaning of the ceiling panel and mounting surface.

After removing the old filter bags, use a copper brush and a vacuum cleaner to clean the surface of the tube sheet, the holes, and the surrounding areas to remove dust, debris, and fragments of the damaged filter bags, ensuring no dust remains.  The edges of the tube sheet holes should be polished and trimmed to remove burrs. Wipe the sealing surface of the tube sheet with a cloth dampened with industrial alcohol. After drying, check for flatness. If there are any uneven areas, use shims to level them, ensuring a proper fit for the new filter bags.

3. Precise installation of the new filter bag.

Slowly unfold the pre-treated new filter bag, ensuring the bag’s expansion ring is facing the tube sheet.  Using both hands, hold the top of the filter bag and lower it vertically into the hole in the tube sheet, ensuring the expansion ring is fully seated in the groove of the tube sheet hole.Key operating points for the fixing method: When using clamp-type fixing, insert the clamp onto the upper opening of the filter bag, ensuring it is tightly against the lower surface of the tube sheet. Tighten the bolts with a torque wrench to the specified torque (generally 8-12 N·m), ensuring even force distribution on the clamp to prevent damage to the filter bag due to overtightening or leakage due to looseness. When using tie-down fixing, use high-temperature-resistant rope to evenly tie 3-4 turns along the edge of the tube sheet hole, with the knot positioned below the tube sheet, ensuring the tie-down is secure and does not loosen. During installation, ensure the filter bags are perpendicular to the tube sheet, and the spacing between adjacent filter bags is controlled at 5-10 cm to prevent damage from friction caused by airflow turbulence during operation.

4. Bag position calibration

After the single-compartment filter bags are installed, observe the distribution of the filter bags from multiple angles through the manhole door. Gently adjust any misaligned filter bags using a long rod tool to ensure they are neatly arranged and evenly spaced. Verify that all filter bags are suspended at the same height (allowable deviation ≤3cm). If there are height discrepancies, adjust the expansion ring insertion depth or replace the suspension accessories to level them. Check the distance between the bottom of the filter bags and the dust collector hopper wall to ensure it is ≥20cm to prevent dust accumulation from causing filter bag blockage.

5. Installation quality verification and reinforcement

Each filter bag’s installation quality was checked individually: verifying that the expansion ring and the hole in the tube sheet were tightly fitted, and that the filter bag did not loosen when gently pulled by hand; checking that the filter bag was free from twisting, creasing, or damage; and confirming that there were no missing clamp bolts or tie ropes.  Key areas were reinforced: the bottom of the filter bag was reinforced with high-temperature stitching or fitted with wear-resistant rings to prevent damage from collision with hard objects in the hopper during operation; the sealing strips on the edge of the tube sheet were inspected, and replaced promptly if aged or damaged, to improve overall sealing performance.

III. Post-implementation support (Stable operation phase)

1. System restoration and trial run

After the replacement work is completed, thoroughly clean the inside of the dust collector and remove all tools, debris, and dust from the work area. Close the manhole door, ensuring that the sealing strip is properly compressed.  Restore power according to the asphalt mixing plant startup procedure. First, start the dust collector fan for 5 minutes of no-load operation, checking for any abnormal noises or leaks; then, start the main unit for a load test run, gradually increasing the load to normal operating conditions.

2. Monitoring and debugging of operating parameters

During the trial operation period, key parameters of the dust removal system will be monitored: the pressure difference between the inlet and outlet of the dust collector (normal range 500-1500 Pa), flue gas emission concentration (which must meet the requirements of GB 20426-2021 “Emission Standard of Air Pollutants for Asphalt Concrete Industry,” with particulate matter emission concentration ≤ 10 mg/m³), fan operating current, and equipment vibration. If a sudden increase in pressure difference occurs (>2000 Pa), it may indicate that the filter bags are installed too tightly or are blocked, requiring a shutdown for inspection. If the emission concentration exceeds the standard, the filter bags should be checked for damage or improper sealing, and corrective actions should be taken promptly.

3. Standardized operation and maintenance management

Establish a complete lifecycle maintenance record and develop a standardized inspection system: daily inspections should record the operating status of the filter bags (checking for damage or detachment) and pressure differential changes; the dust collector hopper should be cleaned weekly to prevent excessive dust accumulation from compressing the filter bags; adjust the cleaning cycle according to operating conditions, generally performing pulse cleaning every 4-8 hours to ensure thorough cleaning without damaging the filter bags.  It is recommended to conduct a comprehensive inspection of the filter bags every 6 months, and promptly replace batches of filter bags in compartments with a damage rate exceeding 5% to ensure the long-term stable operation of the dust collection system.

Asian Construction Equipment Group Co., Ltd. has always adhered to the philosophy of “precise operation and maintenance, green empowerment.” This guide is compiled based on practical engineering experience and can be flexibly adjusted according to the specific parameters of different asphalt mixing plants and dust removal equipment.  For customized operation and maintenance solutions, high-quality compatible filter bags, or professional technical support, please contact the Asian Construction Equipment Group Co., Ltd. technical service team. We will provide you with comprehensive environmental equipment operation and maintenance services to help your company achieve safe, efficient, and compliant production.

As a leading enterprise in China’s transportation infrastructure construction equipment field, Asian Construction Equipment Group Co., Ltd. (abbreviated as​ ACE Group) has been deeply involved in the research and development and manufacturing of asphalt mixing equipment for over 20 years, consistently focusing on the industry’s technical pain points and solving problems through independent innovation. With the deepening of my country’s new urbanization construction and the strategy of building a strong transportation nation, the requirements for the quality stability, production efficiency, and green and low-carbon properties of asphalt mixtures in major projects such as roads and bridges continue to rise.The core component of an asphalt mixing plant — the mixing mechanism — directly determines the homogeneity of the finished product, production energy consumption, and equipment lifespan. It is also a key bottleneck restricting the breakthrough of domestically produced high-end mixing equipment. Based on this, ACE Group assembled a dedicated R&D team and, after three years of technical research, completed a multi-dimensional optimization and upgrade of the mixing mechanism, forming a core technology system that combines independent intellectual property rights with engineering practicality, providing strong support for the high-quality development of the industry.

DHB Asphalt Drum Mix Plant

I. Current Industry Situation and the Strategic Significance of Technological Breakthrough

In recent years, my country’s transportation infrastructure construction has achieved leapfrog development. In 2023, the total length of newly built and reconstructed highways nationwide exceeded 120,000 kilometers, and the annual consumption of asphalt mixtures exceeded 500 million tons, driving the continuous growth of market demand for mixing equipment. However, significant shortcomings still exist behind the industry’s development: although most domestic enterprises have mastered the basic manufacturing technology of medium and large-sized mixing equipment, in the field of ultra-large equipment with a capacity of tens of millions of tons and a capacity of over 400t/h, foreign brands occupy more than 65% of the market share due to their core technological advantages, and domestic equipment faces the dilemma of being “large but not strong”.The core problem lies in the fact that the design theory and manufacturing process of the mixing mechanism lag behind the international advanced level, resulting in large fluctuations in the uniformity of the mixture, insufficient asphalt coating, severe equipment wear, and high energy consumption, which directly affect the quality of the project and the construction cost.

ACE Group deeply understands that optimizing and upgrading mixing mechanisms is not only an inevitable choice to enhance the core competitiveness of products, but also a strategic measure to promote the localization of high-end equipment and ensure the quality and safety of national transportation infrastructure construction. By breaking through the bottlenecks in mixing theory and structural design through technological innovation, the gap with international brands can be effectively narrowed, providing the industry with high-performance, low-energy-consumption, and long-life domestic solutions, demonstrating the technological responsibility and industrial commitment of national enterprises.

II. Multi-dimensional Technical Standards and Core Requirements for Asphalt Mixture Mixing

Modern engineering has upgraded the performance requirements for asphalt mixtures from the traditional macroscopic homogeneity to a multi-dimensional homogenization standard of “precise particle size distribution, sufficient asphalt coating, uniform microscopic dispersion, and stable temperature field.” This places stringent requirements on the design of mixing mechanisms.

1. Particle size distribution uniformity: Coarse and fine aggregates must strictly follow the design ratio to achieve uniform distribution in three-dimensional space, forming a dense and stable skeleton structure to ensure the load-bearing capacity and durability of the mixture;

2. Asphalt coating integrity: High-intensity shearing action breaks down the water film and adsorption layer on the aggregate surface, ensuring that the asphalt binder completely coats the aggregate particles and forms an asphalt film of uniform thickness;

3. Microscopic dispersion stability: Effectively breaks up aggregate agglomeration, ensuring that fillers, admixtures and other components are uniformly dispersed in the asphalt matrix, thus constructing a stable suspension-compact system;

4. Temperature field consistency: During the mixing process, local overheating should be avoided to prevent asphalt aging, or local undercooling to prevent insufficient coating. Ensure that the temperature fluctuation of the mixture outlet is controlled within ±3℃.

5. Green and low-carbon adaptability: While meeting the mixing quality requirements, it minimizes energy consumption and equipment wear, meeting the green development requirements of engineering construction.

III. Innovative Design and Technological Breakthroughs of ACE Group’s Mixing Mechanisms

Addressing the industry’s technical pain points, the R&D team at ACE Group, based on fluid mechanics and particle dynamics simulation analysis and combined with over a thousand experimental verifications, has developed a three-dimensional optimization system of “fluid state optimization + structural upgrade + material innovation,” achieving a leap in the performance of the mixing mechanism.

(一) Innovation in material flow movement mode: design of circulation-shear composite flow pattern

Traditional twin-shaft mixers, operating in either counter-current or purely circumferential flow patterns, suffer from issues such as material retention, insufficient shear strength, and uneven liner wear. ACE Group has innovatively developed a “circulation-shear composite flow” technology, achieving three major breakthroughs through an asymmetric phase angle mixing arm arrangement and optimized guide vane design:

1. It adopts a zoned design of “main mixing zone + auxiliary shearing zone”. The main mixing zone uses a spiral mixing arm to push the material to form a closed circulation, ensuring macroscopic uniformity; the auxiliary shearing zone is equipped with high-strength shearing teeth to form a local turbulent field and enhance the microscopic dispersion effect.

2. Optimize the phase angle of the stirring arm arrangement, controlling the phase difference between adjacent stirring arms to 45°, avoiding material stagnation zones at the shaft ends and corners of the housing, and increasing the material circulation rate by 30%;

3. An innovative guide vane angle adjustment mechanism can dynamically adjust the material flow rate according to the aggregate gradation and asphalt grade, adapting to different working conditions and improving mixing adaptability by 40%.

Compared with the traditional method, the composite flow design improves the wear uniformity of the liner by 50%, extends the service life of the equipment by 35%, and increases the shear strength by 25%, effectively solving the problem of insufficient asphalt coating.

(二) Precise optimization of core structural parameters

Based on a multi-objective optimization algorithm, ACE Group accurately calibrates the key parameters of the mixing mechanism:

(1).Blade helix angle: Adopting a variable helix angle design of 17°-19°, it takes into account both axial conveying efficiency and radial mixing intensity, increasing the axial conveying speed of materials by 20% and avoiding local accumulation;

(2).Stirring arm spacing and angle: The spacing between adjacent stirring arms is optimized to 120mm, and the angle is set to 75° to form a continuous stirring trajectory, reducing the material residence time to less than 2s;

(3).Main and auxiliary shaft speed matching: Utilizing variable frequency speed control technology, the speed difference between the main and auxiliary shafts is stabilized at 17%-18%, forming an efficient shear field and reducing the coefficient of variation of asphalt film thickness by 40%.

(4).Innovative Liner and Blade Materials: Utilizing NM450 wear-resistant alloy steel and a ceramic composite coating, a “stepped self-cleaning liner” was developed, extending service life by 60% and reducing uneven mixing caused by material adhesion. Upgraded Sealing and Heat Dissipation Structure: Adopting a double-seal + negative pressure dustproof design, combined with a forced air cooling system, reduces equipment failure rate by 30%, adapting to harsh working conditions such as high temperatures and dust.

(三) Integration of intelligent control technology: adaptive adjustment system for operating conditions

ACE Group has deeply integrated intelligent sensing technology with the mixing mechanism to develop a “condition-adaptive adjustment system”: equipped with an infrared temperature sensor, a material level sensor, and a torque sensor, it monitors parameters such as the temperature of the mixture, the material level, and the mixing resistance in real time;

A database of mixing parameters is established based on big data algorithms. The speed, mixing time, and blade angle can be dynamically adjusted according to aggregate moisture content, gradation changes, asphalt viscosity, etc., to achieve “one machine adapting to multiple working conditions”.

It integrates remote diagnostics and predictive maintenance modules, which can provide early warnings of wear and tear on vulnerable parts through equipment operation data analysis, thereby reducing operation and maintenance costs.

IV. Engineering Application Case: Epoxy Asphalt Paving Project for Steel Deck of a Cross-Sea Bridge

A provincial-level eight-lane expressway reconstruction and expansion project, with a total length of 89 kilometers, requires the supply of 1.2 million tons of asphalt mixture, with stringent requirements for the uniformity, durability, and production efficiency of the mixture. The project adopted a mixing plant equipped with a new composite fluid mixing mechanism. After six months of practical application, third-party testing data showed:

· The standard deviation of Marshall stability decreased from 1.3kN to 0.7kN, with a coefficient of variation ≤5%, which is better than the industry limit of 10%.

· The average thickness of the asphalt film was 68μm, and the coefficient of variation was optimized from 16% to 8%.

· The actual production efficiency of a single machine reaches 420t/h, which is 5% higher than that of traditional equipment, and the unit energy consumption is reduced to 8.2kg standard coal/t, a 15% reduction in energy consumption;

· The equipment can operate continuously without failure for up to 720 hours, reducing the failure rate by 32% and extending the replacement cycle of vulnerable parts to 8,000 hours.

· The road surface achieved a 100% pass rate in the first inspection of core indicators, and there were no early damages, ruts, or other defects within three months of opening to traffic.

V. Technical Summary and Future Outlook

By innovating the flow pattern, optimizing the structure, and integrating intelligence into the mixing mechanism, ACE Group has successfully addressed the industry pain points of traditional mixing equipment — namely, poor uniformity, high energy consumption, and rapid wear — achieving simultaneous improvements in mixing quality, production efficiency, and green, low-carbon practices. This technological breakthrough not only demonstrates ACE Group’s independent innovation capabilities but also drives the transformation of domestically produced high-end asphalt mixing equipment towards “precision, intelligence, and greenness,” providing reliable domestic equipment support for transportation infrastructure construction.

In the future, Asian Construction Equipment Group Co., Ltd. will continue to deepen its technological research and development: First, it will focus on the integration of intelligent control and digital twin technology to build a visualized management system for the entire life cycle of the mixing process; second, it will explore the application of new environmentally friendly materials and mixing mechanisms to further reduce energy consumption and carbon emissions; and third, it will expand the research and development of ultra-large capacity (above 600t/h) mixing equipment to overcome the technical challenges of mixing under extreme working conditions.

Asian Construction Equipment Group Co., Ltd. will always take technological innovation as its core driving force, adhere to the product philosophy of “independent and controllable, high performance, green and low carbon”, and continuously provide the industry with more competitive high-end equipment and solutions, injecting a continuous stream of technological power into the construction of a transportation powerhouse.

In the field of asphalt pavement engineering, technical terminology is the core carrier of technical communication, equipment operation, and engineering construction. As a high-tech enterprise specializing in the R&D and manufacturing of asphalt mixing equipment and engineering technical services, Asian Construction Equipment Group Co., Ltd. (abbreviated as ACE Group)

 deeply understands the importance of standardized and precise terminology application in ensuring project quality and improving construction efficiency. This article, combining industry standards and ACE Group’s technical practices, systematically sorts out, optimizes, and expands the core technical terminology related to asphalt mixing plants, covering four core dimensions: materials, mixtures, construction, and equipment, providing authoritative reference for industry colleagues.

I. Materials (ACE Group’s Preferred Standard Compatible Materials)

1. Asphalt: A blackish-brown solid/semi-solid viscous substance obtained through crude oil distillation, solvent extraction, or coal processing, or naturally occurring. It is the core binder of asphalt mixtures. ACE Group recommends using petroleum asphalt that conforms to the GB/T 15180 standard, suitable for different climate zones and engineering strength requirements. It covers three major categories: natural asphalt, petroleum asphalt, and coal tar pitch. Its penetration, ductility, softening point, and other indicators must be precisely matched with the process parameters of the mixing equipment.

2. Coarse aggregate: Aggregates such as crushed stone, crushed gravel, screened gravel, and slag with a particle size greater than 2.36mm in asphalt mixtures are the core components constituting the aggregate skeleton structure. The coarse aggregates compatible with ACE Group’s mixing equipment must meet the technical requirements of a crushing value ≤26% and an abrasion value ≤28%, with a predominantly cubic particle shape to ensure the stability of the skeleton interlocking.

3. Fine aggregate: This refers to natural sand, manufactured sand, and stone chips with a particle size less than 2.36mm in asphalt mixtures. Its core function is to fill the gaps between coarse aggregates and improve the density of the mixture. ACE group recommends using fine aggregates with high cleanliness and a mud content ≤3%, with an angularity index ≥30s for better adhesion to asphalt.

4. Filler: Mineral powder with a particle size of less than 0.075mm, common types include cement, lime, fly ash, and finely ground limestone powder. ACE Group’s mixing equipment and its matching powder supply system can precisely control the filler dosage, requiring a specific surface area ≥300m²/kg, which can significantly improve the cohesion and water stability of asphalt mixtures.

5. Modified asphalt: Asphalt binder with properties optimized by adding modifiers such as rubber, resin, polymers (e.g., SBS, SBR), and finely ground rubber powder, or by undergoing slight oxidation processing. ACE Group’s intelligent mixing equipment can achieve precise metering and uniform dispersion of modifiers, and is compatible with mainstream products such as SBS modified asphalt and rubber modified asphalt, meeting the anti-rutting and anti-aging requirements of high-grade highways.

6. Emulsified asphalt: A uniformly dispersed system (asphalt emulsion) made by high-speed shear emulsification of petroleum asphalt (or coal tar pitch) and water under the action of emulsifiers and stabilizers. It is classified into spray type (for tack coat and primer coat) and mixing type (for ambient temperature mixtures) according to application scenarios. ACE Group’s ambient temperature mixing equipment is compatible with emulsified asphalts with different demulsification rates, ensuring uniform mixing.

7. Cationic emulsified asphalt: Positively charged emulsified asphalt prepared with cationic emulsifiers has strong adhesion to acidic aggregates (such as granite), fast demulsification speed, and is suitable for tack coat and prime coat construction. ACE Group’s asphalt distributor truck can achieve precise spraying.

8. Anionic emulsified asphalt: negatively charged emulsified asphalt prepared with anionic emulsifiers has good compatibility with alkaline aggregates (such as limestone), high mixing stability, and is often used for mixing asphalt mixtures at room temperature.

9. Modifiers: External admixtures that improve the performance of asphalt, including polymers such as SBS (styrene-butadiene-styrene block copolymer), SBR (styrene-butadiene rubber), and PE (polyethylene), as well as finely ground rubber powder and fibers. ACE Group’s mixing equipment is equipped with a dedicated modifier addition device, enabling metering with an accuracy of 0.1%.

10. Stabilizers: Additives used to improve the storage stability of emulsified asphalt (such as calcium chloride and bentonite) to prevent asphalt particles from segregating. ACE Group recommends using stabilizers that meet the JT/T 375 standard to ensure that the emulsion shelf life is ≥6 months.

11. Solvent: A volatile liquid (such as gasoline, kerosene, diesel) used to dilute petroleum asphalt to produce liquid petroleum asphalt. ACE Group’s mixing equipment is equipped with a solvent storage and metering system to ensure accurate and controllable dilution ratio.

II. Mixed Materials (ACE Group Mixing Equipment Adaptation System)

1. Asphalt mixture: The general term for mixtures formed by mixing mineral aggregates (coarse aggregates, fine aggregates, and fillers) with asphalt binders in a designed ratio. It is the core road construction material for asphalt pavements. ACE Group’s mixing equipment can achieve precise proportioning and production of different types of mixtures.

2. Asphalt Concrete Mixture: Asphalt concrete, also known as asphalt concrete, is a mixture of coarse aggregate, fine aggregate, and filler aggregates arranged in a continuous gradation, mixed with asphalt to produce a mixture that meets technical standards (represented as LH when graded using a round-hole sieve). ACE Group’s forced intermittent mixing equipment can achieve a mix proportion deviation of ≤±2% for this type of mixture, meeting the requirements for high-grade highway surface layers.

3. Dense-graded Asphalt Concrete: A mixture with continuous aggregate gradation and dense interlocking particles, resulting in a residual void ratio of <10% after compaction. Type I dense-graded asphalt concrete (void ratio 3%–6%, 2%–6% for pedestrian roads) is suitable for main road surfaces; Type II semi-dense-graded asphalt concrete (void ratio 4%–10%) is suitable for secondary roads. ACE Group’s intelligent control system can monitor the void ratio in real time.

4. Semi-open graded asphalt mixture: also known as asphalt macadam mixture (represented by LS when graded by round hole sieve), it is made by mixing coarse aggregate, fine aggregate and a small amount of filler (or no filler) with asphalt. The residual void ratio after compaction is >10%. It is suitable for road base or subbase. ACE Group’s mixing equipment can adjust the mixing time to ensure uniformity.

5. Open-graded asphalt mixture: The aggregate gradation is mainly coarse aggregate with a low content of fine aggregate. The particles are dispersed and the porosity after compaction is >15%. It has drainage and noise reduction functions and is often used for the surface layer of drainage pavement. ACE Group equipment can accurately control the fine aggregate content to meet the gradation requirements.

6. Gap-graded Asphalt Mixture: The aggregate gradation is missing one or more particle size grades (such as missing 4.75~9.5mm particles), forming a skeleton-void or skeleton-dense structure, such as OGFC (open-graded drainage asphalt wearing course). ACE Group’s mixing equipment supports custom gradation curve settings.

7. Emulsified asphalt aggregate: This is an ambient temperature mixture made by mixing emulsified asphalt and aggregates at room temperature. It has a compaction residual void ratio of >10%, is energy-saving and environmentally friendly, and is suitable for low-grade highways or maintenance projects. ACE Group’s ambient temperature mixing plant can achieve high-efficiency production.

8. Modified asphalt mixture: Asphalt mixtures using modified asphalt as binder have excellent resistance to rutting and cracking. ACE Group’s mixing equipment is equipped with a dedicated modified asphalt heating and mixing system to ensure stable performance of the mixture.

9. Colored Asphalt Mixture: A mixture made by adding colored pigments and special modifiers, suitable for landscape roads and sidewalks. ACE Group equipment is compatible with precise metering of pigment addition.

10. Recycled Asphalt Mixture: A mixture made by adding recycled asphalt pavement material (RAP material). ACE Group’s recycled mixing equipment can adjust the RAP material content from 0 to 50%, and is equipped with a heating and screening system for the recycled material, making it energy-saving and environmentally friendly.

11. Extra coarse asphalt macadam mixture: maximum aggregate size ≥37.5mm (45mm for round hole sieve), suitable for road subbase. ACE Group’s large-scale mixing equipment can be adapted to the heating and mixing of large-diameter aggregates.

12. Coarse-grained asphalt mixture: The maximum aggregate size is 26.5mm or 31.5mm (30-40mm for round hole sieve), suitable for the lower layer of the road surface. The aggregate screening system of ACE Group Equipment can accurately control the gradation.

13. Medium-grained asphalt mixture: The maximum aggregate size is 16mm or 19mm (20mm or 25mm for round hole sieve). It is suitable for the intermediate layer of the road surface and is the core structural layer material of high-grade highways.

14. Fine-grained asphalt mixture: The maximum aggregate size is 9.5mm or 13.2mm (10mm or 15mm for round hole sieve), suitable for the surface layer of road.

15. Sandy Asphalt Mixture: Maximum aggregate size ≤ 4.75mm (5mm for round hole sieve), also known as asphalt stone chips or asphalt sand, suitable for sidewalks, bicycle lanes or road seals.

III. Construction-related (Adaptation to ACE Group’s standardized construction processes)

1. Hot-mix asphalt pavement: Asphalt and aggregates are mixed at 150-180℃ and paved at 120-150℃. This is the mainstream construction technology for high-grade highways. ACE Group’s hot-mix mixing plant can precisely control the mixing temperature and paving temperature.

 2. Asphalt mixture pavement at ambient temperature: pavement made by mixing emulsified asphalt or diluted asphalt with aggregates at ambient temperature (5-35℃), which is convenient to construct and energy-saving and environmentally friendly.

3. Prime coat: To enhance the adhesion between the asphalt surface layer and the non-asphalt base layer (such as cement-stabilized crushed stone base layer), a thin, penetrating layer of emulsified asphalt, coal tar pitch, or liquid asphalt is poured onto the base layer surface, with a penetration depth ≥5mm.

4. Tack Coat: A thin layer of asphalt material applied to enhance the bond between asphalt layers and between asphalt layers and cement concrete pavement or bridge deck. The application rate is controlled between 0.3 and 0.6 kg/m².

5. Sealing Coat: A thin layer of asphalt mixture laid to seal the voids on the road surface and prevent moisture intrusion. The layer laid on the surface of the surface course is called the upper sealing coat (anti-skid, anti-aging), and the layer laid below the surface course is called the lower sealing coat (waterproof, bonding). ACE Group’s mixing equipment can produce slurry sealing coat and chip seal coat mixtures.

6. Slurry seal: The seal is formed by mixing stone chips, fillers (cement, fly ash, etc.), emulsified asphalt, admixtures and water in a certain proportion to form a fluid dynamic mixture, which is then evenly spread on the road surface. ACE Group’s slurry seal machine can achieve integrated construction.

7. Crushed stone seal: This is a seal layer formed by first spreading asphalt binder, then evenly spreading crushed stone and compacting it. It is suitable for preventive maintenance of road surfaces. ACE Group’s asphalt distributor and crushed stone spreader can work together.

8. Liquid petroleum asphalt: A product made by diluting petroleum asphalt with solvents such as gasoline, kerosene, and diesel. It is also known as light asphalt or diluted asphalt and is suitable for tack coat and primer coat construction. ACE Group equipment is compatible with its storage and metering.

9. Paving temperature: The temperature during asphalt mixture paving. The paving temperature of hot-mix asphalt mixture is ≥120℃. ACE Group pavers are equipped with a temperature monitoring system to ensure construction quality.

 10. Compaction temperature: The temperature during asphalt mixture compaction. Initial compaction temperature ≥ 110℃, final compaction temperature ≥ 70℃. ACE Group road rollers can adjust the compaction process according to temperature requirements.

11. Curing period: The time from the completion of asphalt pavement construction to the opening of traffic. The curing period for hot-mix pavement is ≥4 hours, and for normal temperature pavement it is ≥24 hours. The specific time needs to be adjusted according to the temperature and the type of mixture.

12. Recycling Construction: The process of using a milling machine to recycle old asphalt pavement material (RAP material), which is then screened, heated, and mixed with new aggregates and new asphalt to form recycled mixture for repaving the road surface. ACE Group’s recycling mixing plant can achieve efficient utilization of old materials.

13. Milling: The operation of breaking and cutting old asphalt pavement with a milling machine, recycling old materials and repairing the pavement base. ACE Group’s matching milling machine can accurately control the milling depth (0-100mm).

IV. Equipment (ACE Group’s core products and components)

1. Asphalt Mixture Mixing Equipment: Also known as asphalt mixing plant/mixing equipment, it is the core equipment for preparing road surface mixtures by heating, metering, and mixing asphalt, aggregates, powders, and additives according to the designed proportions. ACE Group’s mixing plants cover three major series: forced intermittent, continuous, and recyclable, possessing advantages such as intelligent control, high efficiency and energy saving, and environmental compliance.

2. Forced Intermittent Asphalt Mixing Equipment: Employing a “batch batching-forced mixing” mode, each batch independently completes aggregate screening, heating, metering, and mixing, enabling precise control of the mix proportions (deviation ≤ ±1%) and quality. It is the preferred equipment for high-grade highway construction. ACE Group’s equipment of this type is equipped with a PLC intelligent control system, supporting remote monitoring and data traceability.

3. Continuous Asphalt Mixing Equipment: Production equipment for continuous heating, batching, and mixing of aggregates, with high production efficiency (up to 400t/h), suitable for large-scale road engineering. ACE Group equipment is equipped with a variable frequency speed control system to achieve flexible adjustment of output.

4. Recycled Asphalt Mixture Mixing Equipment: This equipment integrates the functions of recycling, screening, heating, and mixing of recycled materials. It can add 0-50% RAP material. ACE Group ‘s equipment is equipped with a dual heating system (low-temperature heating of recycled materials + high-temperature heating of new materials) to prevent aging of recycled materials and to save energy and protect the environment.

5. Mobile asphalt mixing plant: The equipment modules can be quickly disassembled, transported, and assembled, making it suitable for temporary projects or remote construction sites. ACE Group ‘s mobile equipment has a small footprint, a short installation period (≤7 days), and performance consistent with stationary equipment.

6. Fixed Asphalt Mixing Plant: A large-scale mixing equipment fixedly installed on site, with strong production capacity (100-600t/h), suitable for long-term, large-scale projects. ACE Group ‘s fixed equipment can customize aggregate bins and asphalt tank capacity according to needs.

7. Indoor Asphalt Mixture Production Line: The mixing equipment, material yard, and loading and unloading processes are integrated into a closed workshop to achieve full-process indoor operation, effectively control dust and noise pollution, and meet environmental protection requirements. ACE Group ‘s indoor production line is equipped with a high-efficiency dust removal and sound insulation system.

8. Aggregate heating system: The core component of the asphalt mixing plant, which uses a burner to heat the aggregate to 160-190℃. ACE Group equipment is equipped with an energy-saving burner (thermal efficiency ≥92%), which supports multiple energy sources such as diesel, natural gas, and biomass fuel.

9. Asphalt Storage Tanks: Insulated containers used for storing asphalt. ACE Group ‘s storage tanks are equipped with electric heating or steam heating systems, and the insulation temperature is controlled at 130-150℃ to prevent asphalt from solidifying. The capacity ranges from 50 to 500t.

10. Powder Supply System: Composed of powder silos, screw conveyors, and weighing scales, it is responsible for the storage, transportation, and accurate metering of fillers. ACE Group ‘s system is equipped with an anti-bridging device to ensure a stable powder supply.

11. Dust Removal Equipment: To handle the dust generated during the mixing process, ACE Group ‘s equipment adopts a two-stage dust removal system of “cyclone dust collector + bag dust collector”. The dust emission concentration is ≤10mg/m³, which meets the national environmental protection standards.

12. Intelligent Control System: The PLC control system independently developed by ACE Group integrates functions such as formula management, metering control, temperature monitoring, fault alarm, and data statistics. It supports dual operation via touch screen and computer and can realize remote operation and maintenance.

13. Asphalt Sprayer Truck: A vehicle specially designed for uniformly spraying tack coat, primer, and liquid asphalt. ACE Group ‘s sprayer truck is equipped with an intelligent flow control system, with a spraying accuracy of ≤±3% and an adjustable spraying width (2～6m).

14. Paver: A specialized piece of equipment that spreads asphalt mixture evenly on the road surface. The paving thickness (0-300mm) and width (2-12m) can be adjusted. ACE Group pavers are equipped with an automatic leveling system to ensure road surface flatness (standard deviation ≤2mm/3m).

15. Road Roller: Equipment used to compact the paved mixture, achieving a specified density (≥96%) and strength through rolling. ACE Group’s road rollers include steel-drum rollers (static/vibratory) and rubber-tired rollers, which can be used in combination depending on the type of mixture.

16. Milling machine: Specialized equipment for milling and crushing old asphalt pavement. ACE Group’s milling machine is equipped with a hydraulic drive system, and the milling depth is precisely adjustable. The old material recycling rate is ≥95%.

Conclusion

Technical terminology is the foundation for technological inheritance and innovation in the asphalt mixing plant industry. Asian Construction Equipment Group Co., Ltd. consistently focuses on “standardization, intelligence, and greening,” integrating the application of standardized terminology into the entire process of equipment research and development, manufacturing, and engineering services. This article summarizes core terms covering key technical nodes in the industry, providing precise reference for engineering technicians, equipment operators, and project managers.

In the future, Asian Construction Equipment Group Co., Ltd. will continue to deepen its expertise in the asphalt mixing equipment field, continuously optimize its product technology and service system, and promote the standardization of industry terminology and technical specifications. For further information on the application scenarios of terminology in actual engineering projects, equipment selection and adaptation solutions, or customized technical services, please feel free to communicate with the Asian Construction Equipment Group Co., Ltd. technical team at any time, and work together to build high-quality asphalt pavement projects.

As my country’s highway infrastructure construction develops towards high quality and precision, asphalt mixing plants, as core equipment in road construction, directly affect project quality and construction efficiency through their installation accuracy and system stability. As a professional road equipment R&D and manufacturing enterprise, Asian Construction Equipment Group Co., Ltd. (abbreviated as ACE Group) has been deeply involved in the asphalt mixing plant field for many years. Based on extensive engineering experience and technological innovation, it has formulated this “Standardized Installation Technical Specification for Asphalt Mixing Plants”.This specification is for reference only. Actual installation operations require flexible adjustments based on specific project conditions (such as geological conditions, equipment model differences, and local environmental requirements). If necessary, consult the ACE Group team for customized guidance. This specification focuses on the key technical points, quality control, and safety requirements of the entire installation process. It aims to provide a scientific, standardized, and practical technical reference for the installation of various models of ACE Group asphalt mixing plants, helping to ensure that each set of equipment meets design performance indicators, providing reliable production guarantees for customers, and promoting the improvement of quality and efficiency in road construction projects.

I. General Provisions

(一) Purpose of the Procedure

As a core production equipment in road construction, the installation quality of asphalt mixing plants directly determines the production efficiency, product qualification rate, and equipment lifespan of the asphalt mixture. To standardize the entire installation process of ACE Group asphalt mixing plants, unify technical standards, clarify operational requirements, prevent safety risks, and ensure that the equipment achieves its designed capacity and environmental protection targets after installation, this procedure is hereby formulated. This procedure applies to the installation engineering of new construction, relocation, and renovation projects of all models of ACE Group asphalt mixing plants.

(二) Scope of Application

This procedure covers all stages of installation, including pre-installation preparation, main equipment installation, auxiliary system deployment, electrical integration, commissioning, and acceptance. It is applicable to ACE Group’s engineering and technical personnel, cooperating construction units, and on-site workers, serving as a technical reference for installation operations. It should be noted that safety, environmental protection, and special equipment management regulations may differ in different regions. Actual operation should prioritize compliance with current local regulations. The content of this procedure does not replace specific compliance requirements.

(三) Core Principles

Installation work must adhere to the principles of “safety first, technical compliance, precise positioning, and closed-loop management,” and strictly implement the national “Installation and Acceptance Specifications for Asphalt Concrete Mixing Equipment” and the requirements of the ACE Group Technical Manual to ensure that the installation process is safe and controllable and that the installation quality meets the standards and achieves excellence.

II. Pre-installation Preparations

（一）Site and foundation engineering

1. Site Selection and Planning: The site must be flat, with geological bearing capacity meeting equipment operation requirements, far from densely populated areas, and away from underground pipelines and areas susceptible to natural disasters. The site must be rationally planned with raw material storage areas, finished material stacking areas, equipment operation areas, and maintenance access routes to ensure smooth passage for transport vehicles and sufficient operating space for construction machinery; a complete drainage system should be installed to prevent water accumulation from eroding the foundation structure.

2. Foundation Design and Construction: Based on the equipment foundation drawings provided by ACE Group and the geological survey report, a detailed foundation design will be conducted. The strength and impermeability grade of the foundation concrete must meet the design requirements, and the size and depth of the anchor bolt pre-drilled holes must be precisely controlled. After construction, the foundation surface must be kept flat, and the curing period must meet the requirements for concrete strength development. During the curing period, it is strictly forbidden to pile heavy objects or apply external forces.

3. Foundation Acceptance: After the foundation construction is completed, load-bearing capacity testing and dimensional verification are required, and a professional test report must be issued. Special attention should be paid to checking the anchor bolt embedment positions, foundation elevation, and the verticality of reserved holes. Equipment installation can only proceed after the foundation has passed inspection.

(二) Equipment unpacking inspection and storage

1. Arrival Inspection: Upon arrival of the equipment, a joint acceptance inspection will be conducted by technical personnel from ACE Group, the supervision unit, and the construction unit. The model and quantity of the main unit, components, and spare parts will be verified against the “Equipment Packing List,” with a focus on checking the appearance integrity of easily damaged parts. Professional testing methods will be used to inspect the quality of key components to prevent hidden damage during transportation.

2. Document Verification: Verify the equipment’s factory certificate of conformity, material inspection report, electrical schematic diagram, installation manual, and other technical documents to ensure that the documents match the equipment model and that all signatures and seals are complete. Simultaneously collect relevant qualification documents and test reports for special equipment and archive them as required.

3. Equipment storage: After unpacking, the equipment should be stored according to the type of components. The main components should be protected against rain and moisture. Electrical components and seals should be stored in a dry warehouse. Metal parts should be treated to prevent rust. Precision instruments should be stored separately and protected against moisture and shock.

(三) Preparation of Tools and Materials

1. Specialized tool configuration: Equipped with lifting equipment that meets the requirements for equipment hoisting and installation, testing tools with accuracy meeting measurement standards, welding equipment adapted to equipment assembly needs, and electrical testing instruments. All tools must be metrologically calibrated and have valid labels affixed to ensure that their performance and accuracy meet the operational requirements.

2. Requirements for auxiliary materials: Anchor bolts, gaskets and other connecting parts must meet the strength grade requirements; sealant must be a temperature-resistant and oil-resistant product suitable for the equipment’s operating conditions; lubricating oil must strictly follow the model specified by ACE Group; and insulation materials must meet the requirements for thermal conductivity and protective performance.

III. Main Equipment Installation Specifications

(一) Installation of the main mixing tower

1. Base Installation: Using professional lifting equipment, the base of the mixing plant is hoisted to the designated position on the foundation and initially fixed with anchor bolts. The base is then leveled using a leveling tool. Once the level is achieved, a secondary grouting method is used to fill the gap between the base and the foundation. The strength of the grout must meet the design requirements. After the grout has reached the required strength, the anchor bolts are tightened according to the specifications.

2. Tower Assembly: Install the main tower sections in a bottom-up order, layer by layer. The flange connection surfaces of adjacent sections must be cleaned and sealed properly, and high-strength bolts must be used for fastening. After each tower section is installed, use professional instruments to measure its verticality and correct any deviations promptly to ensure the overall verticality of the tower meets design standards.

3. Mixing System Installation: Hoist the mixer to the designated location inside the main mixing building and securely fix it to the tower body using connectors. Precisely connect the mixer’s inlet, outlet, and all pipes to ensure a leak-free seal at the connections; install the mixing motor and reducer, and adjust the tension of the transmission components to ensure smooth operation of the transmission system.

(二) Drying drum installation

1. Bracket Installation: Install the appropriate bracket according to the size and weight requirements of the drying cylinder. The bracket foundation must be stable and level. Use lifting equipment to hoist the drying cylinder onto the bracket and secure it firmly with positioning pins and bolts to ensure the drying cylinder is placed stably.

2. Burner Installation: Accurately install the burner at the designated location on the drying cylinder, ensuring the installation position meets design requirements. Connect the fuel supply pipeline and control system to the burner. After installation, a rigorous sealing check must be performed to prevent fuel leakage and potential safety hazards.

3. Transmission System Debugging: Install the drive motor, reducer, and transmission components of the drying drum, and adjust the tension of the transmission device to ensure that the drying drum can rotate smoothly and steadily. Start the motor for a no-load test run to check the stability of the drying drum operation and troubleshoot any abnormal vibrations or noises.

(三) Vibrating screen installation

1. Frame Fixing: Hoist the vibrating screen frame to the designated installation location and securely fix it to the foundation using anchor bolts or welding. Use a leveling tool to adjust the frame’s levelness to ensure stable installation. A vibration damping device must be installed between the frame and the foundation to ensure the vibration reduction effect meets design requirements.

2. Screen Installation: Select and install a suitable screen according to the aggregate screening requirements. The screen must be taut, secure, and free from damage or looseness. Install the vibratory motor and adjust the angle of the motor eccentric block to achieve the required vibration frequency and amplitude, ensuring that the screening efficiency meets the standards.

IV. Installation of auxiliary equipment and pipelines

(一) Installation of the batching system

1. Silo Installation: Install various raw material silos (stone silos, powder silos, asphalt tanks, etc.) according to design specifications, ensuring that the silos are installed securely and that the spacing between each silo meets the requirements for operation and maintenance. Powder silos need to be equipped with dust collectors and arch-breaking devices, and asphalt tanks need to be equipped with heating devices and temperature control systems to ensure the silos function properly.

2. Feeding Equipment Installation: Install a suitable feeder (belt scale, screw conveyor, electromagnetic vibrating feeder, etc.) at the bottom of the silo. Adjust the discharge port position of the feeding equipment to ensure that the material can smoothly enter the next process. Connect the electrical control system of the feeding equipment to achieve precise control of the feeding rate.

(二) Installation of the conveyor system

1. Belt Conveyor Installation: Lay the belt conveyor according to the process flow, ensuring the frame is installed flat and firmly, and that the idlers and rollers meet the specifications. Adjust the belt tension to prevent belt deviation during operation; install necessary safety protection devices to ensure safe equipment operation.

2. Powder Conveying Pipeline Installation: Install various types of powder conveying pipelines. The pipeline material must meet the requirements for wear resistance and sealing. Pipeline connections must be tight, and seals must be used to prevent powder leakage. Necessary valves and elbows should be installed on the pipelines to ensure smooth powder conveying.

3. Installation of Asphalt Conveying Pipelines: Asphalt conveying pipelines must be insulated to prevent the asphalt from solidifying during transport. Specialized sealing materials must be used for pipe connections to ensure a tight seal. An asphalt pump and heating equipment must be installed to ensure the asphalt can be smoothly delivered to the mixing system.

(三) Installation of dust removal system​

1. Dust Collector Installation: Select and install a suitable dust collector based on the batching plant’s production capacity and environmental standards. The installation location should facilitate operation and maintenance, ensuring smooth connections between the dust collector’s inlet and outlet pipes. The dust collector must be linked to the control system to achieve automated adjustment of the dust removal function.

2. Ventilation duct installation: Lay ventilation ducts to effectively connect the dust collector to each dust-generating point in the mixing plant. The ventilation ducts must have sufficient strength and sealing to ensure effective dust collection; the duct layout must be reasonable to avoid sharp bends or the risk of blockage.

3. Exhaust Fan Installation: Install an exhaust fan at the end of the ventilation system. The fan’s airflow and pressure must meet the design requirements of the dust removal system. Adjust the fan’s direction and speed to ensure stable negative pressure in the ventilation system. The fan installation must be equipped with vibration damping devices to reduce operating noise.

V. Electrical System Installation and Commissioning​

(一) Installation of electrical control cabinet

1. Cabinet Fixing: The electrical control cabinet must be installed in a dry, well-ventilated control room. The cabinet must be installed vertically and level, firmly fixed to the ground, and reliably grounded. The spacing between cabinets must meet the requirements for operation and maintenance space, facilitating future maintenance.

2. Wiring Specifications: Wiring inside the control cabinet must be carried out according to the electrical schematic and wiring diagram. Wire and cable types must meet design requirements. Wiring of different voltage levels and purposes must be laid separately and clearly labeled. Terminals must be securely crimped, and wiring insulation performance must meet standards.

(二) Wiring between the motor and the sensor

1. Motor Wiring: An insulation resistance test must be performed before wiring the motor to ensure good motor performance; the wiring method must strictly follow the requirements on the motor nameplate, and protective measures must be taken for cable laying. The motor casing must be reliably grounded, and large motors must be equipped with overload protection devices.

2. Sensor Installation: Temperature, pressure, and weight sensors must be installed in designated locations to ensure accurate measurement data. Sensor wiring shielding must be effectively grounded, and signal transmission cables must be kept away from power cables to avoid signal interference. Sensors must be calibrated before installation to ensure measurement accuracy meets design requirements.

(三) Installation of grounding and lighting systems

1. Grounding System Installation: A complete grounding system shall be constructed using a combined grounding method, including grounding electrodes, grounding wires, and grounding busbars. The installation depth and material of the grounding electrodes must meet standards, the grounding wire connections must be secure and reliable, and the grounding resistance must meet safety requirements. Equipment metal casings, electrical control cabinets, motors, etc., must all be reliably grounded.

2. Lighting System Installation: Sufficient lighting fixtures shall be installed in the mixing plant’s operating area and control room. The lighting intensity must meet the needs of operation and maintenance, and the protection level of the fixtures must be appropriate for the operating environment. Lighting circuits must be laid independently and equipped with emergency lighting devices to ensure lighting needs are met in the event of a sudden power outage.

VI. Equipment Commissioning and Trial Operation

(一) No-load commissioning

1. Individual Unit Commissioning: After completing equipment installation and electrical wiring, start each unit in the order of “electrical first, then mechanical; auxiliary equipment first, then main unit”. Observe the equipment operation status, check the motor rotation, transmission component operation and lubrication effect, troubleshoot abnormal vibration or noise, and ensure that the individual unit operating parameters meet the design requirements.

2. Interlocking Debugging: After the individual machine debugging is qualified, start the entire set of equipment for interlocking no-load debugging. Simulate the actual production process, check the interlocking control functions between the equipment, verify the smoothness of the material conveying path and the accuracy of valve action, and ensure the reliability of the emergency stop function.

(二) Load Trial Operation

1. Trial Production Preparation: Prepare qualified raw materials according to the design mix ratio and check that the quality of the raw materials meets the specifications. Adjust the equipment operating parameters to ensure that all systems are in a ready state; formulate a trial production plan, clarifying the operating procedures and safety precautions.

2. Trial Production Operation: Gradually increase the input of raw materials and carry out trial production operations according to plan. Monitor the equipment operating status in real time, record key operating parameters (temperature, pressure, output, etc.), and check the equipment sealing performance and wear condition; conduct quality testing on the produced asphalt mixture to ensure that the product quality meets the standards.

3. Problem rectification: Problems discovered during the trial operation (such as material leakage, abnormal noise, parameter deviation, etc.) will be addressed by the technical personnel of ACE Group, who will lead the development of rectification plans, complete the rectification within a specified time limit, and retest until the problem is completely resolved.

VII. Acceptance and Delivery

(一) Acceptance Standards and Contents

1. Installation quality acceptance: In accordance with this procedure and relevant national standards, check the installation accuracy (levelness, verticality, concentricity, etc.), the firmness and sealing performance of the connection parts, and verify the standardization of electrical wiring and the integrity of the equipment appearance.

2. Performance index acceptance: Test the equipment’s production capacity, product quality pass rate and energy consumption level, check whether environmental protection indicators (dust emissions, noise, etc.) meet the requirements, and ensure that the overall performance of the equipment meets the design standards.

3. Document Acceptance: Verify the technical documents required for acceptance (equipment unpacking and acceptance record, foundation inspection report, installation and construction record, commissioning report, raw material certificate of conformity, etc.) to ensure that the documents are complete, the data is accurate, and they meet the archiving requirements.

(二) Preparation of Acceptance Report

After acceptance, the Asphalt Mixing Plant Installation Acceptance Report shall be jointly prepared by ACE Group, the construction unit, and the supervision unit, which shall specify the acceptance content, acceptance method, acceptance results and rectification status, and attach supporting materials such as equipment photos and test reports, and shall be signed and confirmed by the participating units.

(三) Delivery and Training

1. Equipment delivery: After acceptance is completed and all issues are rectified, the equipment handover procedures will be completed, and the equipment technical data (installation manual, operation manual, maintenance manual, spare parts list, etc.) and acceptance report will be handed over to the user. Both parties will sign the delivery confirmation document.

2. Personnel Training: ACE Group’s technical personnel conduct systematic training for user operators and maintenance personnel, including equipment structure and principles, operating procedures, troubleshooting methods, and key points of daily maintenance. After the training, an assessment is conducted to ensure that relevant personnel have the ability to operate and maintain the equipment independently.

VIII. Supplementary Provisions​

1. This specification is subject to interpretation and revision by the Engineering and Technology Department of Asian Construction Equipment Group Co., Ltd.. Any matters not covered herein shall be handled in accordance with current national standards and equipment technical manuals. The content of this specification is for reference only and will be updated to reflect industry technological developments and engineering practices during revision.

2. Installation work must strictly adhere to safe operating procedures. The construction unit must provide complete safety protection facilities, and all personnel must be certified and comply with safety management regulations. These safety requirements are for reference only; actual requirements must comply with national work safety regulations and the project’s specific safety plan.

3. After the equipment is installed, a regular maintenance plan should be developed and maintenance work should be carried out as required. The specific maintenance requirements should be in accordance with the “Maintenance and Maintenance Procedures for Asphalt Mixing Plants” of ACE Group.

IX. Conclusion

This “Standardized Installation Technical Specification for Asphalt Mixing Plants of ACE Group” is a concentrated reflection of Asian Construction Equipment Group Co., Ltd. technical strength and engineering experience. Its content is for reference only and does not constitute a final technical commitment or legal basis. The core value of this specification lies in providing a standardized and detailed reference framework for installation operations and offering full-cycle technical support for equipment installation quality. In practical application, relevant units should flexibly adjust the specifications according to the specific circumstances of the project (such as geological conditions, equipment models, local regulations, etc.), strictly adhere to current national standards and regulations, strengthen process control, pay attention to details, and ensure the safety and compliance of every procedure.In the future, Asian Construction Equipment Group Co., Ltd. will continue to track industry technology development and engineering practice needs, dynamically optimize and upgrade this specification, provide customers with more targeted technical references, and help my country’s road construction industry achieve high-quality development.