engleski

Strength and deformation properties of the concrete- to-rock contact

The testing of shear strength and deformability characteristics of the contact between the limestone and concrete was carried out for the purpose of foundation of the high arch dam, using the test of constant normal load. Nine blocks with contact surface of 707  707 mm were tested in the underground testing adits. The results of the peak and residual strength of the contact are presented through the Mohr-Coulomb linear and nonlinear strength criteria. It is shown that at the determination of residual strength, the application of normal stress reducing procedure is more adequate than normal stress increasing procedure. The deformability of the contact zone is described by the shear stiffness and dilation angle. The analysis of shearing results shows that the concrete to limestone contact behaves in accordance with the constant peak displacement model.

shear ; strength ; concrete ; rock ; contact

nije evidentirano