• Reshma sivan
• Sindhu A R

Many types of soil reinforcements are used and it’s a reliable method for improving the soil strength. Geocomposites are used for this purpose. Various types of geosynthetics are there geogrids, geotextiles etc. A composite of rubber and coir fiber are used in this present study. Use of fiber and rubber for stabilizing the soil is economical because they are cost effective, commonly available and eco-friendly. Soil sample was reinforced with the composite. CBR tests were conducted on soil specimen with composite at various depth to determine the optimum depth. The composite placed at 20%, 40%, 60%and 80% of the total depth from top of the sample and optimum position of composite was determined.CBR test conducted corresponding to its optimum moisture content in the CBR mould with and without composite. Soaked tests are conducted in the laboratory. Strength of the soil was improved by adding rubber –coir composite .The highest increase in the CBR value was obtained when composite placed at 20% depth from the top of the specimen.The thickness of the subgrade can be reduced by incooparating the composite at the optimum position

rubber coir composite, California bearing ratio, optimum position, subgrade

"Subgrade Strength Improvement Using Rubber-Coir Composite", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.426-428, May 2019, Available :http://www.jetir.org/papers/JETIRCV06093.pdf

"Subgrade Strength Improvement Using Rubber-Coir Composite", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp426-428, May 2019, Available at : http://www.jetir.org/papers/JETIRCV06093.pdf