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Geogrids are designed to be a support structure in geotechnical and civil engineering applications. Geogrids manufactured with the extrusion of a polymer must posses the necessary level of tensile strength and low creep. In this paper, a study on application of stepped isothermal method for prediction of creep behavior of extruded polypropylene geogrid used for soil reinforcement was carried out. On the basis of the obtained data, a possibility of creep prediction for structures with geosynthetics for periods of time much longer than experimental measurements was demonstrated.

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