含盐量对水泥灰土强度特性的影响

Effects of Salt Content on Strength Characteristic of Cement Lime Soil

通过对水泥灰土不同含盐量试样进行一系列三轴不固结不排水剪切试验,探讨了含盐量对水泥灰土剪切强度参数的影响,并从微观结构性上做出了合理的解释。试验结果表明:水泥灰土强度随含盐量的增加而增大,但当含盐量达到一定程度时,其强度又随含盐量的增大而降低,且含盐量存在一个分界值;此外,水泥灰土的脆断性受围压和含盐量等因素的影响,围压越小,含盐量越高,脆性就表现得越明显。

By a series of no consolidated undrained shear triaxial tests of cement lime soil specimens with different salt contents, effects of salt contents on shear strength parameters of cement lime soil were discussed and reasonable explanation on the micro-structure was introduced. The test results show that the intensity parameter of cement lime soil increases with increasing of salt content, but when the salt content reaches a certain level, its strength decreases with increasing of salt content, and there is a boundary value in salt content. Moreover, the brittle fracture resistance of cement lime soil is influenced by factors such as confining pressure, salt content, etc. The smaller the confining pressure is, the higher the salt content is, the more obvious the brittleness of cement lime soil is.