International Research Journal of Engineering and Technology (IRJET)
e-ISSN: 2395-0056
Volume: 09 Issue: 07 | July 2022
p-ISSN: 2395-0072
www.irjet.net
Comparison of Soil stability using Silica fume and Basalt fiber on Black cotton soil Mrs. Megha S. Mahaladkar1, Mrs. Megha Mayuri B G2 1Assistant
Professor, Department of Civil Engineering, Mangalore Institute of Technology & Engineering, Karnataka, India 2Assistant Professor, Department of Civil Engineering, Mangalore Institute of Technology & Engineering, Karnataka, India ---------------------------------------------------------------------***---------------------------------------------------------------------
Abstract - It is essential to choose soil stabilization if good
conditions and behavior upon the addition of chemicals or compaction etc. This technique of enhancing the soil condition have been prevalent since time and been used in the field of agriculture to obtain the soil with desired properties. Over the years the same technique became prevailing in construction sector owing to the any advantages it poses. Mechanical stabilization and chemical stabilization are the two broad categories into which all kinds of soil stabilization may be categorized. A soil's grading is altered during mechanical stabilization by mixing it with other types of soil of various grades. When a soil is stabilized mechanically, its grading is altered by combining it with other soil types of various grades. By doing so, a compacted soil mass can be achieved Contrarily, chemical stabilization refers to the alteration of soil characteristics by the addition of chemically active substances. Understanding the material qualities involved in the mixing of soils and the results after mixing are crucial for soil stabilization.
soil is not accessible at the construction location. The technique of stabilizing soil aims to maintain or enhance the functionality of the soil as a building material. This study has been undertaken to investigate the comparison of soil stability by using Silica Fume and Basalt Fiber on black cotton soil which has inadequate natural stability. The index properties of clayey soils might need to be improved to make them suitable for construction using any kind of stabilization methods. Stabilization of black cotton soils has been traditionally relied on treatment with lime, cement or waste materials such as silica fume, rice husk, steel slag etc. The main objective of this study is to investigate the effect of index properties of clayey soils when blended with silica fume and basalt fiber. A series of laboratory experiments have been conducted on samples with 0%, 5%, 10%, 15% and 20% of Silica fume and 0.05%, 0.1%, 0.15% and 0.2% of Basalt fiber by weight of dry soil. The test results showed a significant change in consistency limits of samples containing Silica fume and basalt fiber. The investigation showed that the Silica fume is a valuable material to modify the index properties of black cotton soil to make them suitable for different construction activities. The addition of basalt fiber gives a very good compressive strength to the BC soil as compared to silica fume.
1.1 Black Cotton Soil Indians refer to expansive soil by the term "black cotton soil” (BC soil). Expansive soils are those that undergo volume changes when in contact with water. It expands when it rains. shrinks during the summer due to water intake. season. The features of expansive soils are due to the presence of clay minerals that are swelling. The salient features or the characteristics of expansive soil include the free swell index, swelling pressure and potential, which are directly related to the stability and strength of the foundation above such soil. Characteristic swell and shrinkage of BC soil produces concerns like foundational cracks. Thus, it is essential to enhance these soils' characteristics to prevent damage to the structure.
Key Words: Soil Stabilization, Black cotton soil (Expansive soil), Silica fume, Basalt fiber
1.INTRODUCTION The rapid growth of urbanization worldwide, is prompting a vast infrastructure development in the recent decades which necessitates the building activities in almost all types of soil regardless of its strength. Hence the ground improvement techniques like soil stabilization have become mandatory before the construction activities. But many a times when engineers come face to face with the challenge of carrying out the construction on soil with less physical strength creating a need to have a proper knowledge about their properties and factors which affects their behavior. Hence the process of enhancing the soil strength qualities to achieve a strong foundation for construction is a very much required job and has to be carried out carefully taking in the essential properties of each soil, its nature, surrounding
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1.2 Silica Fume Amorphous Silica is a kind of silicon dioxide. It is a byproduct of the manufacturing of silicon and ferrosilicon alloys and is made up of spherical particles with an average particle diameter of 150 nm. Its primary use is as a pozzolanic component in high performance concrete. This silica fume can also be used to stabilize soils and improve their qualities. The average size of the spherical particles in
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