Experimental Study on the Effect of Varying Cement Additive Percentages on the Mechanical Properties and Durability of Cement-Improved Loess

Abstract

In order to study the influence of cement on the mechanical properties of remolded loess. Incorporating 3%, 4%, 5%, 6 %, and 7% cement into the remolded loess, the consolidation and direct shear tests were performed on the remolded soil samples to analyze the relationship between different amounts of cement and the mechanical indexes of the remolded loess. The test results show that the incorporation of cement improves the deformation resistance and shear strength of remolded loess. The compression modulus of remolded loess increases with the increase of loess content, but the compression coefficient decreases gradually. The cohesion and internal friction angle of remolded loess increase with the increase of cement content, but the cohesion increases more obviously, while the internal friction angle is not obvious. The incorporation of cement can greatly improve the anti-disintegration ability of loess. With the increase of cement content, the anti-disintegration effect is more obvious. When the cement content is 3%, the cumulative disintegration component is almost 0. Finally, the research shows that the anti-deformation performance, shear strength and anti-disintegration ability are greatly improved when the cement ratio is 3 %, which is the optimal ratio economically. The research results can provide theoretical support and reference for the future foundation engineering construction in loess area.