Experimental Evaluation of Geojute Reinforced Sand Beds under Repetitive Loading

Vedpathak, S D and Saride, Sireesh (2013) Experimental Evaluation of Geojute Reinforced Sand Beds under Repetitive Loading. Masters thesis, Indian Institute of Technology, Hyderabad.

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Abstract

In this research, a series of large scale dynamic model tests were carried out on geojute and jute-geocell reinforced sand subgrade in controlled laboratory condition. The tests are conducted on geojute and jute-geocell (made from waste jute bags) reinforced and unreinforced sand subgrade under repeated loading to simulate traffic conditions. The placement density of sand in all the tests was maintained at 70% (stiffer subgrade) and 30% (weaker subgrade). A constant area of geojute and jute-geocell reinforcement was maintained throughout the test series. Cyclic behavior was investigated through varying the density, number of geojute layers and geojute arrangement. The influence of the width and height of the jute-geocell reinforcement on the cyclic behavior of the loading system was studied and performance improvement in terms of traffic benefit ratios and cumulative plastic deformation was determined. The loading was applied through a circular steel plate which replicates the load application from a passenger car replicating a single axle wheel load. A single axle wheel load was applied through a sophisticated double acting linear dynamic actuator which is attached to a 3.5m high reaction frame.

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