掺砂水泥复合土力学性能研究

Mechanical Properties Research on Cement Mixed with Sand

水泥复合土不同围压下的常规三轴试验和无侧限抗压强度试验结果表明:在水泥土中掺入一定量的砂,可以提高水泥土的无侧限抗压强度;在有围压作用的情况下,掺砂水泥复合土的偏应力—应变关系曲线有明显的峰值,偏应力—应变关系曲线属加工软化型,其残余强度和破坏应变随着围压的增大而增大。通过SEM电镜扫描照片,进一步从微观角度分析了水泥复合土的固化机理。

The results of composite cement soil under different confining pressure of conventional triaxial test and unconfined compressive strength test show that：cement soil mixed with a certain amount of sand,which can improve the cement-soil unconfined compressive strength;stress-strain curves of sand-doped cement composite soil in the case of confining pressure obvious peak the peak stress-strain curve is a softening type,the residual strength and failure strain with the increase of confining pressure and growth.Through SEM scanning electron microscope photos and from the microscopic point of view,it analyzes the curing mechanism of composite cement soil.