Estimation of long-term creep deformation on geogrids by accelerated test

Abstract

In the geosynthetics engineering field, long-term creep deformation of polymeric geogrids has been evaluated by performing of creep test under a constant temperature. However, it is difficult to directly evaluate the long-term creep deformation of polymeric geogrids corresponding to the design life time by using this method. In the present study, a series of accelerated creep tests based on time-temperature superposition principle was performed to evaluate long-term creep deformation of various types of polymeric geogrids. In total four types of geogrids made by polypropylene (PP), high-dense polyethylene (HDPE), polyester (PET) and vinylon were used. As a result of the present study, it was confirmed that accelerated creep test can evaluate the long-term creep deformation of various types of polymeric geogrids.