http://www.iaeme.com/IJARET/index.asp 1188 editor@iaeme.com International Journal of Advanced Research in Engineering and Technology (IJARET) Volume 11, Issue 6, June 2020, pp. 1188-1193, Article ID: IJARET_11_06_109 Available online athttp://www.iaeme.com/IJARET/issues.asp?JType=IJARET&VType=11&IType=6 ISSN Print: 0976-6480 and ISSN Online: 0976-6499 DOI: 10.34218/IJARET.11.6.2020.109 © IAEME Publication Scopus Indexed SOIL STABILIZATION USING LIME AND RICE HUSK ASH Shafi Kamal Rahman, Avijit Paul Department of Civil Engineering, CIT Kokrajhar, Kokrajhar, Assam, India ABSTRACT Government declaring many schemes for road construction, which results in increase of road construction. Therefore, need of hour is to develop novel methods to reduce the cost of the construction of the road. Since road surface is constructed over the subgrade and the moving load coming from the moving vehicles, its serves as a support for the entire pavement system. Therefore, the quality of the natural weak subsoil needs to be improved to improve its strength and load-bearing capacity, as well as other technical properties and also it will be a most essential part of economizing construction activities. This paper emphasizes the stabilizing effect of low-strength cohesive soil with a mixture of various materials such as rice husk ash (RHA) and lime, which are inexpensive and readily available. At first the soil is stabilized with 3, 6, 9, 12, and 15 percentages of lime in different combinations, and then it is mixed with 5, 10, 15, and 20 percent of RHA. It is then compacted with water content 5% above the optimal moisture content (OMC). California Bearing Ratio (CBR) and Unconfined Compressive Strength (UCS) tests were conducted on the mixed soil and also on the original soil. The results show a significant improvement in CBR and UCS values of the mixed soils compared to those of the original soil. Key words: Construction Materials, Rice Husk Ash, Lime, Soil. Cite this Article: Shafi Kamal Rahman and Avijit Paul, Soil Stabilization using Lime and Rice Husk Ash, International Journal of Advanced Research in Engineering and Technology, 11(6), 2020, pp. 1188-1193. http://www.iaeme.com/IJARET/issues.asp?JType=IJARET&VType=11&IType=6 1. INTRODUCTION Soil is deposited or formed by nature under various environmental conditions. Humans cannot control the process of soil formation. Therefore, these layers of soil on the site must be accepted as such, and all construction must be adjusted to suit subsoil conditions. Existing soil conditions for a given site may not be suitable to support the desired construction such as buildings, bridges, dams, roads, etc. This is because the soil's safe bearing capacity may not support a given load. Therefore, the existing weak soil needs to be strengthened by adopting other artificial means, but keeping the price in control. The improvement of the existing soft ground soil can be accomplished by modification or stabilization or both. Geological properties of the