Static Simple Shear Tests on Mechanical Behavior of Interface Between Coral Sand and Concrete

There are various concrete foundations and retaining structures on the islands and reefs, which are subjected to various static and dynamic loads. The interaction characteristics of the contact surface between coral sand and concrete is the key to affect the stress and deformation of rock and soil mass and structure. The static simple shear test of the contact surface between coral sand and concrete was carried out using the simple shear tester. The influence of normal stress, different roughness, particle size and relative density on the static shear characteristics of the surface of contact was studied. The relation between axial displacement, shear stress and tangential displacement of interface. The experimental results indicate that the magnitude of the normal stress has a certain effect on the normal displacement and shear stress of the contact surface, and there is a direct proportional relationship between shear strength and applied normal stress.; the roughness of the contact surface is relatively dense with the coral sand The degree also has a positive effect on the shear stress of the contact face; The particle size has a certain influence on the shear stress and normal displacement of the contact surface.