Performance of composite geogrid reinforced unpaved pavements under cyclic loading

This paper presents an experimental study on evaluating the performance of composite geogrid (CGG) reinforced and unreinforced unpaved pavement models using a steel box that has length width height 1.0 m 1.2 respectively. A subgrade CBR 2.5% (unsoaked) was prepared to thickness 500 mm, then granular base compacted top subgrade. Three course thicknesses, namely 200 300 mm 400 were adopted in this study. Pavement subjected repeated loading with maximum pressure 550 kPa. The test results suggest thick performs better compared bases. Furthermore, CGG reinforcement is effective decreasing deformation also reducing vertical stresses weak for thinner pavements. Nevertheless, potential benefits diminish increase because would act as rigid boundary, failure occur above layer.