Abstract
CSG (Cemented Sand and Gravel) has come to be used as a new material for large civil structures such as impounding dams in recent years because of its advantages of producing by using materials easily obtained in and around each project site and simpler facilities compared to conventional concrete. However, its material properties other than the compressive strength that is used for basic structural design have not been fully clarified. In this paper, the effects of loading rate effects on the tensile strength and tension softening properties including fracture energy and tension softening diagram of CSG, those are essential to evaluate the seismic performance of CSG structures during large earthquakes, are experimentally investigated. The test results indicate that both tensile strength and fracture energy increase as the loading rate increases. Based on these results, experimental formulae of dynamic tensile strength and fracture energy of CSG are proposed. The tension softening diagram of CSG is also estimated and its practical model for numerical analysis is proposed.
