Technical Report (In Japanese)
EXPERIMENTAL STUDY ON FUNDAMENTAL CHARACTERISTICS OF UNIAXIAL TENSILE STRENGTH OF SOFTROCKS
2018 Volume 74 Issue 2 Pages 225-233
Details
2018 Volume 74 Issue 2 Pages 225-233
A series of uniaxial tensile tests and Brazilian tests were conducted on six kinds of softrocks to study fundamental characteristics of uniaxial tensile strength. The sizes of the specimens were varied to study the influence of scale effect. Moreover, the orientations of specimens and loading directions were varied to study the influence of anisotropy. The test results demonstrated that the tensile strengths obtained by uniaxial tensile tests and Brazilian tests were comparable but may depend on the rock types. The scale effect was found insignificant for a small range of diameters of specimens, from 50mm to 200mm. Moreover, the anisotropic nature of tensile strengths was not significant for some kinds of softrocks.
