Abstract
The stabilization of weak subgrade soil with natural geotextile fiber is a cost-effective to improve the stability of the low-volume roads (LVRs). The coir geotextile is naturally available eco-friendly and biodegradable material having the high strength and durability compared to the other natural material. The present study, the test were conducted to determine the effectiveness of coir fiber and coir geotextile mats under the static and dynamic loading condition by using the CBR and WTT respectively. The inclusion of the coir geotextile fiber to the BC soil subgrade improved the load bearing capacity in soaked and un-soaked condition. The study was also conducted with two types of the coir mats under the repeated loading condition with help of the fabricated mould. It has two layer flexible pavement system like subgrade and sub-base are prepared according to CBR Standard. From the results, it was concluded that the provided coir geotextile mats helps in the slow settlement, reduce the permanent deformation/rut improved the performance of the roads. The placement of coir geotextile in both the test (CBR and WTT) showed the significant improved in reinforced section improved the service life of the flexible pavement structure with lower cost of maintenance.
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