An Assessment of Mechanical Properties of Geo-Grid Reinforced Material and its Applicability

Geo-composites are generally made by hybridizing of some components among geo-textile, geo-grid, geo-membrane, geo-net, and other materials. Due to practical applicability of geotechnical structures, the demand of geo-composites, especially for drainage application, has gradually increased. In the present study, the geo-composites bonded with geo-grid in chemical process were investigated experimentally in terms of strain evaluation and creep response values. Geo-grid plays an important role as a reinforcing material. Three kinds of geo-grid were prepared as strong yarn polyester and they were woven type, non-woven type, and wrap knitted type. The sample geo-grids were then coated with PVC. The rib tensile strength tests were conducted to evaluate geo-grid products in terms of tensile strength with regard to single rib. The test was performed according to GRI-GGI. The test results revealed that the tensile strains at the maximum tensile strength showed very good tensile deformation characteristics in the range of 10.0-13.0% in terms of mono-rib performance. Any significant trends have not found between warp knitted and woven type geo-grid in terms of the tensile strength ratios. Further experimental analysis has been conducted to investigate the wide-width strip tensile strength, contact point strength and creep features of the geo-grid samples used in this study. It was concluded again from the experiments that the tensile and creep strains of the geo-grid showed so stable values that the geo-grid prepared in this study could protect geo-textile partially in practical structure.

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