Stabilization of Soft Subgrade Soil with Non-Woven Coir Geotextiles
Journal Title: International journal of Emerging Trends in Science and Technology - Year 2017, Vol 4, Issue 5
Abstract
In this work, the possibility of using non woven coir geotextile in soft subgrade soil was investigated. Flexible pavement have mostly problems like formation of potholes, ruts, cracks and localized depression and settlement. These are mainly due to insufficient bearing capacity of the subgrade. In the CBR method of pavement design (IRC 37-2001), total thickness of pavement increases with decrease in the CBR value of subgrade soil, which in turn increases the cost of construction. To achieve the economy and for proper performance of roads, it is necessary to improve the strength of the soil. In this study, needle punched nonwoven coir geotextile material and adhesive bonded non –woven coir geotextile of varying densities were utilized to improve the bearing capacity of subgrade. CBR tests were conducted on soil samples with coir geotextiles of varying densities being interfaced between soft subgrade and unbound aggregate. In order to evaluate the performance, the reinforcement ratio was obtained based on the CBR load- penetration relation of both soft subgrade-gravel and soft subgrade-geotextile-gravel. Comparison of reinforcement ratio showed that the performance of pavement was improved with inclusion of non-woven coir geotextiles.
Authors and Affiliations
M. Mohamed Ashik
Keywords
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