ABSTRACT
An international round-robin (IRR) test programme was launched in 1996 as a central facet of the TC-29 activities. The programme aimed at providing a valuable framework of reference. Based on the outcome from the programme, recommendation for procedures referred to triaxial and torsional shear tests may be developed. Nineteen laboratories, spreading over six nations, participated into the IRR tests, performed reconstituted Toyoura sand, reconstituted Fujinomori clay and sedimentary soft rock. This report briefly describes the IRR test programme, prepared by a working group in the Japanese domestic committee for TC-29. The reported results are analysed by the authors paying attentions to the stress-strain behaviour over a wide strain range from 10−5 to 10−2. It has been manifested that the test results are consistent among different laboratories worldwide only when the specified procedures for testing are properly followed using a properly instrumented apparatus.
