THE MECHANICAL PROPERTIES OF STRIPA GRANITE

The mechanical properties of Stripa granite are presented as determined from small (laboratory size), oven-dried specimens, The properties determined include Young's modulus, Poisson's ratio, unaxial compressive fracture stress, and the expansion coefficient, all as a function of temperature, In addition the Brazilian tensile fracture stress, residual shear strength as a function of a normal stress and the rock's anisotropy ratios are presented, Finally ultrasonic determinations at 1 MHz of the rock's dilatational wave velocity are given and the deduced Young's modulus is compared with the static value for room temperature. This report is one of a series documenting the results of the Swedish-American cooperative research program in which the cooperating scientists explore the geological, geophysical, hydrological, geochemical, and structural effects anticipated from the use of a large crystalline rock mass as a geologic repository for nuclear waste