Abstract
The pullout performance of geosynthetic reinforcements under static and sustained loading is described in this paper. Laboratory tests were conducted to investigate the cumulative effects of loading on the pullout capacity and behaviour of geogrid reinforcements. The test methods and procedures for analyzing and interpreting the data are presented. The mechanics of load transfer and reinforcement displacement are also examined. In general, the results showed that under static loading applications the geogrid experienced a gradual deformation with load increase. No peak load was observed with the system of loading used and the deformation of the geogrid was mainly close to the point of load application. The sustained loading tests showed no cessation of creep displacement of the geogrid throughout the testing periods of this investigation. Keywords: Geosynthetics; Geogrids; Soil Reinforcement; Static Loading; Creep