Abstract

High-quality geosynthetics of high-stiffness materials are being increasingly used in developing countries although they are not always readily available. An alternative approach in some situations is to use a larger amount of low-stiffness reinforcement. Triaxial tests have been performed on plastic mesh reinforced sand. The sand density, mesh stiffness and the number of reinforcing layers were varied. From these tests it was concluded that there may be a limiting reinforcement stiffness, influenced by the number of reinforcing layers after which there will he no further gain in strength. The density of sand reinforced using plastic mesh is found not to control strongly the strength. The results also revealed that the use of multiple layers of low-quality material can be more effective than the use of fewer layers of high-stiffness reinforcement.

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