Research on prediction of cement-soil cohesion based on strength test

Abstract

In order to accurately predict the cohesive of cement-soil and better reflect the shear strength of cement-soil, through indoor strength tests and theoretical analysis, the influence of cement mixing ratio on shear strength and unconfined compressive strength is discussed. In the commonly used cement mixing ratio range (5%-30%), prediction formula of cohesive and unconfined compressive strength is proposed. The cohesive prediction model based on cement mixing ratio and age is further established. The results show that the unconfined compressive strength and cohesive strength of cement-soil increase with the increase of cement mixing ratio and curing age. There is a good linear relationship between cohesion and unconfined compressive strength. Based on nonlinear regression analysis, the prediction model of cohesive under the influence of multiple factors fits well with the test results.