关键词: 水泥土, 共振柱试验, 剪切模量, 阻尼比

Abstract: To research the dynamic shear modulus and damping ratio of cement-stabilized soil, the dynamic properties of three types of cemented soil were studied using resonant column test. They are cemented soil, slag cement stabilized soil, and cement with sodium silicate stabilized soil .The amount of cement admixed, the magnitude of confining pressure and the amplitude of shearing strain are considered. Test results show that with the increase of confining pressure, the maximum shear modulus of cement stabilized soil increases and the minimum damping ratio decreases. The relationship of shear modulus versus shearing strain conforms with the Ramberg-Osgood equations using regression analysis. Under the same confining pressure, slag cement stabilized soil has the largest shear modulus and the smallest damping ratio. The results also indicate that the cement with sodium silicate stabilized soil is able to sustain larger shearing strain before stiffness degradation than the other additives do.

Key words: cement stabilized soil, resonant column test, shear modulus, damping ratio