What Is Atterberg Limit?
Atterberg limits are the water content thresholds at which a fine-grained soil transitions between four physical states: solid, semi-solid, plastic, and liquid.
The concept was first introduced by Swedish soil scientist Albert Atterberg in the early 1900s and later refined for engineering applications by Karl Terzaghi and Arthur Casagrande. Today, Atterberg limits are among the most fundamental tests in soil mechanics and geotechnical engineering.
In simple terms: when you add water to dry clay soil, it changes. First it's crumbly and brittle. Add more water and it becomes moldable like putty. Add even more and it starts to flow. The Atterberg limits define exactly where those transitions happen — at what percentage of water content each change occurs.
These limits apply specifically to fine-grained soils — clays and silts — because coarse-grained soils like sand and gravel don't exhibit this water-dependent plasticity behavior in any meaningful way.
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Paper URL: https://www.ijtsrd.com/engineering/civil-engineering/27831/utilization-of-bamboo-fibers-for-modification-of-black-cotton-soil-properties/m-anvesh-kumar
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Soil stabilization is the process which involves enhancing the physical properties of the soil in order to improve its strength, durability etc. by blending or mixing with additives. The different types of method used for soil stabilization are Soil stabilization with cement, Soil stabilization with lime, Soil stabilization using bitumen, Chemical stabilization and a new emerging technology of stabilization by Geo textiles and Geo synthetic fibers. In this study, we are making use of bamboo fibers as geo synthetic material for stabilization of soil. With the introduction of bamboo fibers to the soil the CBR values will improve and thickness of pavement layer also gets reduced. It also reduces the intensity of stress on subgrade. Bamboo fibers is such a geosynthetic material which is easily available, ecofriendly and also cost effective. With the application of soil stabilization method in construction the overall cost gets reduced when compared to the ordinary method of construction. The Highway Research Board HRB classification of the soil strata like black cotton soil and sedu soil is done using suitable sampling technique such as Core Cutter Method. To determine the characteristics like Grading by Sieve Analysis, Atterbergs Limits i.e Liquid limit using Cone Penetration Method and Casagrande Method, Plastic limit by rolling the sample to 3mm diameter thread, Shrinkage limit using Shrinkage apparatus, Optimum Moisture Content and Maximum Dry Density using Standard Proctor Test and also California Bearing Ratio by conducting CBR test. The pavement thickness was designed using pavement design catalogues published by IRC SP 20 2002. The estimation for the street is finished by considering the thing, for example, Earthwork Excavation for Roadway and Drains, Jungle Cutting, compacting and reviewing and so forth., according to SR 2016 17, PW, P and IWT circle Andhra Pradesh and proposing of particulars for the blend of Bamboo strands as Geo Synthetic material for adjustment.
