Abstract
A series of unconfined as well as triaxial compression tests was carried out on specimens of Toyoura sand mixed with cement. The behaviour of elastic Young's modules at extremely small strains, together with its variation with strain and stress was examined over a wide strain range (10-6-10-2), and also over a wide stress range (0-2.4MPa). In this paper, methods for measuring properly stress-strain and strength characteristics of weakly bonded geomaterials such as cement-mixed sand are in detail discussed. Effects of cement content, curing period, effective confining pressure and its history on deformation characteristics of cement-mixed sand were each examined with attention paid to the interlink between elastic Young's modulus and strength. The results were interpreted against comparable behaviour of clean sand exhibiting no interparticle bondings.
