International Journal of Innovative Technology and Exploring Engineering (IJITEE) ISSN: 2278-3075, Volume-9 Issue-8, June 2020 767 Published By: Blue Eyes Intelligence Engineering & Sciences Publication Retrieval Number: H6721069820/2020©BEIESP DOI: 10.35940/ijitee.H6721.069820 Influence of Lime, Rice Husk Ash and Coconut Fibre on Strength Properties of Subgrade Rahila Jan, Mohd. Irshad Malik, Amanpreet Tangri Abstract: Soil stability is a significant criterion in the field of development, for soil which needs adequate steadiness, different adjustment strategies can be embraced. The entrenched methods of soil adjustment regularly utilize such establishing operators like cement. Substitution of solidifying substance with commercial or agriculture outcome is profoundly attractive. Rice husk ash is an extremely prospective agriculture dissipates as pozzolanic materials that bring about a prevalent property after joined with lime. Also, coconut fibre is well known for its durability and high resistance and gives well establishing results when combined with lime and rice husk ash. This study worked on the experimental investigation of clayey soil with admixtures like lime, rice husk ash and coconut fibre. This study included the calculation of properties of the soil as consistency limits and strength characteristics. Clay type of soil is used in this study. In view of compaction, expansion of lime, RHA and coconut fibre diminishes the dry density and expands the moisture content. From the perspective of strength characteristics and economical terms, expansion of 6% lime, 8 % RHA and 1 % coconut fibre are prescribed as ideal value for subgrade soil adjustment. Key words: soil stabilisation, lime, RHA, coconut fibre, clay. I. INTRODUCTION Stabilized soils are composite materials that result from mix and upgrade of the properties of individual materials. The entrenched strategies of soil adjustment are regularly used to acquire improved geotechnical materials through either the extension to soil of setting operators, for instance, Portland concrete, lime, black-tops, etc. Due to the extension in the measure of strong waste wherever all through the world, specialists & analysts complete numerous examinations to discover the utilizations for these wastes. Ecological and budgetary problems in numerous nations motivated interest in the advancement of elective substances which can satisfy structural layout. The transit development and ecological ventures have the best potential for re-use since they utilize huge amounts of earthen materials every year. Substitution of virgin soils, aggregates, and concrete with strong modern side-effect is exceptionally alluring. Shrivastava et al. (2014) worked on clay soil stabilization. It was discovered that liquid limit diminished when 5% lime was included yet got expanded when 5 - 20% RHA was included. Plastic limit got expanded, additionally shrinkage limit got expanded yet pliancy file got diminished. Expansion of RHA to lime settled soil diminished the expanding behaviour of soil to an enormous degree. Revised Manuscript Received on June 05, 2020. Rahila Jan, Student, Department of Civil Engineering, Chandigarh University, India. Mohd. Irshad Malik, Department of Civil Engineering, NIT Jalandhar, India. Amanpreet Tangri, Department of Geotechnical Engineering (GNDEC), NIT Jalandhar, India. Devdatt et al. (2015) observed that expansion of coconut coir fibre into extensive soil has changed the compaction parameters. The OMC of soil got diminished and MDD got expanded with expansion of coconut coir fibre. Soaked CBR value got expanded fundamentally with expansion of coconut coir content. Expansion of 1% of coconut coir fibre into soil, expanded CBR value from 3.9 to 8.6. II. MATERIALS AND METHODS The materials used in this research are clay soil, lime, and rice husk ash and coconut fiber. A. Soil: Clay is the littlest particles among the other two sorts of soil. The particles in this soil firmly stuffed together with one another with no airspace. These soils pass through 4.75 mm sieve. Clay soil is taken from region of Himachal Pradesh. To check the properties of soil, standard proctor test and consistency limit is conducted. Properties of clay soil constituent value Liquid limit 46% Plastic limit 26.90% Plasticity index 19.06% Optimum moisture content 16% Maximum dry density 9.2 KN/m 3 CBR 7.60% Shear strength 15Kg/cm 2 B. Lime "Lime" means to items got from warming limestone. It begins with its most punctual use as building mortar and has the feeling of "sticking or adhering”. The stones and minerals from which these materials are determined, ordinarily limestone or chalk, are made basically out of calcium carbonate (CaCO3). C. Rice husk ash Rice husk are the strong-defensive covers of granules of rice. Rice cover is isolated from the rice grain by a procedure of winnowing. It is utilized as powers in ovens and heaters in specific ventures, for example, rice factories, pastry kitchens, and so forth and because of proper burning, RHA can be drawn.