Abstract: The behaviour of the road surface depends upon the strength of the fill material and subgrade below it. Road construction on soft subgrade soil is a major issue affecting cost and scheduling of highway road projects. The strength of subgrade is most often expressed in terms of California Bearing Ratio (CBR) which is the ratio of test load to standard load at specified penetration by a standard plunger. In India the design of flexible pavement is primarily on basis of subgrade CBR (IRC 37-2001).Many techniques have been evolved to strengthen the highway soil subgrade. Among them stabilization techniques are most common. In the Present study stabilisation of soft subgrade soil is achieved by using geotextiles. The objective of this study is to find out an increase in strength mobilization in terms of CBR values, by conducting CBR tests on the subgrade soil when reinforced with geotextiles placed at different positions. Silty expansive clay soil and three varieties of geotextile (HP-370, PEC, and TS-50) are used in the study. CBR tests are conducted with the geotextile placed at different depths from top surface of soil in the CBR mould.
Keywords: Geotextiles, CBR, Expansive soils, Subgrade and Woven & Non-woven geotextiles.
Title: An Experimental Study on CBR of Expansive Soil Subgrades using Geotextiles
Author: Pupalwad Arti Sudam, M Padmavathi, K.Ravikumar, M.Nagaraju
International Journal of Civil and Structural Engineering Research
ISSN 2348-7607 (Online)
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