Abstract
Granite is a composite material of rock-forming minerals with discontinuous joints such as grain boundaries and microcracks. Studies of these microstructures are of increasing interest in geophysics and geotechnical engineering relating to underground space development. We first performed uniaxial compressive and relaxation tests for estimating physical properties of discontinuous joints by using three kinds of rocks that consist of quartz, quartz/feldspar and feldspar, respectively. Next a homogenization method is applied to analyze a viscoelastic behavior of granite including these joints.
