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International Research Journal of Engineering and Technology (IRJET)

e-ISSN: 2395-0056

Volume: 10 Issue: 04 | Apr 2023

p-ISSN: 2395-0072

www.irjet.net

Black Cotton Soil Stabilization using Plastic Fibers, Rice Husk Ash and CaCl2 Nikunj Dolasiya1, Hareshwar Jadhav2, Ajay Yadav3, Vidya Gaikwad4 1B. E. Student, Department of Civil Engineering, New Horizon Institute of Technology and Management Thane, Maharashtra, India 2Assistant Professor Department of Civil Engineering, New Horizon Institute of Technology and Management Thane, Maharashtra, India. Corresponding Author: Ms. Resma B. Vijay ---------------------------------------------------------------------***---------------------------------------------------------------------

Abstract - Expansive soils are a worldwide problem that

projects. After stabilization process, weaken soil gets more strength in it. Which means that soil is not weak anymore and has significantly reduced permeability resulting in reduced shrinkage/swelling potential. In addition, soils that have been stabilized have also under goes some modification. We can say that the soil has been physically changed making it easier for compaction and reducing it’s plasticity. Easier compaction is equal to achieving maximum dry density easier.

poses several challenges for civil Engineers due to its poor bearing capacity, low shear strength, etc. The aim of this project is to stabilize the black cotton soil using RHA and CaCl2 and reinforcing by using Plastic fiber. This would improve the soil properties effectively and are economical. The tests conducted for Physical Properties are Moisture Content, Grain Size Distribution and for Engineering Properties are Standard Proctor Compaction Test, California Bearing Ratio Test, Atterberg’s Limit test, Free Swell Index Test and Unconfined Compressive Strength Test are done for black cotton soil mixed with different proportions of Rice Husk Ash and Plastic Fibers then the results are tabulated.

1.2 Merits and De-Merits of Soil Stabilization

Key Words: CBR Test, Black Cotton Soil, Plastic Fibres, Rice Husk Ash, CaCl₂

Merits of Soil Stabilization 1. Stabilizing soils with binders is now an extremely cost effective method of converting poor quality soil into a strong impermeable medium. 2. There is no need to bring other type of soil when the soil on site can be used after a simple treatment process. 3. Improved to give the properties required for construction. 4. Soil stabilization is an different method for improving the characteristics and performance of the soil.

1. INTRODUCTION

Generally from the studies we know that black cotton soil is found to contain montmorillonite clay mineral which has high expansive characteristics. As the colloidal clay content in BC soil is up to 50%. It is also found that it has high plastic limit, high liquid limit and low shrinkage limit. The compaction characteristic of such soil is that they have low dry density and high OMC. The black cotton soil UCC and CBR values are also low for this soil. Solution to this problem is soil stabilization is done by the processes of blending and mixing materials with the soil to improve their certain properties and to achieve a desired size particles or the mixing of normally available admixture that may alter the gradation or plasticity may act as an binder for the cementation of the soil. This might result in reduce the permeability & compressibility on properties of expansive soils and hence increases its bearing capacity.

De-Merits of Soil Stabilization 1. Requires a lot of products per application. 2. Requires extensive soil testing before application. 3. Not always environmentally friendly. 4. Time consuming. 2. METHDOLOGY

Following tests which we are going to be performed on the Black Cotton soil are according to all IS Standards. All the apparatus used during the tests are confirmed from the IS Codes. Further results for the tests are given from the IS Standards limits.

Impact Factor value: 8.226

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