Interface Shear Strength Coefficient of Geogrid Made from Ribbed Smoked Sheet

Abstract

Geogrid is a reinforced material in geotechnical engineering, that is made from synthetic polymers with a mesh shape and is applied to increases the strength and stability of soil structure. In this study, ribbed smoked sheet (RSS), which is a para rubber as natural polymer, was studied as a new alternative material to replace synthetic-polymers geogrid. The study of reinforcement efficiency of geogrid made form RSS (RSS geogrid) was the interface shear strength coefficient (Rin) by large-scale direct shear test under the condition of non-reinforced soil and reinforced soil. RSS geogrid was installed in 2 types of soil, which were clay (fine-grained soil) and sand (coarse-grained soil). From the study, it was found that the Rin of clay and sand were 1.033 and 1.479, respectively. The results shown that RSS geogrid affected to increase of interface shear strength, especially in the sand that is coarse-grained soil.