Effect of sand on the stiffness characteristics of cement-stabilized clay

摘要

This study aims to investigate the effect of sand in the cemented clay matrix by understanding the limitations of conventional mixture design concepts. To characterize the behaviour of cemented sandy clay, an extensive experimental study was conducted based on bender element (BE) testing and ultrasonic pulse velocity (UPV) testing. Scanning electron microscope image showed that stiffer sand particle bonded to the cemented clay matrix caused the increase in stiffness. The velocity ratio and thereby dynamic Poisson's ratio reduced with the increase in stiffness of cemented soil. Finally, a predication model is proposed to estimate the shear modulus and validated with the data obtained from literature for other soil and cement types. (C) 2020 Elsevier Ltd. All rights reserved.