Effect of Cyclic Stress Path in Cement-Treated Sands Using Triaxial and Simple Shear Tests

摘要

This paper presents the results of undrained triaxial and simple sheartests under different stress paths on mixture of Portland cement withclean sand to investigate the effect of principal stress rotations.According to preliminary monotonic tests which revealed that thecement mixture reduces the anisotropy and also improves the mixturemechanical properties compared to compacted sand without cement, itwas decided to perform cyclic tests to compare the behavior underrepeated loading conditions. Test results in triaxial tests showed that theloose cemented sand is stronger than compacted (dense) sand in cyclicbehavior even in more severe loading conditions (larger CSR).Following that, simple shear tests validated the triaxial test resultsestimating a safe cement content value in practical purposes.Furthermore it clarified the effect of the α parameter or rotation ofprincipal stresses on the behavior of cemented sand mixtures.