掺砂水泥土的力学特性研究

通过室内掺砂水泥土的无侧限抗压强度试验，探讨在不同掺砂量、不同龄期条件下，其无侧限抗压强度发展规律。试验研究表明：在水泥掺量一定的条件下，掺入一定量的砂，可以明显地提高水泥土的强度。当水泥掺量为10%时，掺砂量为50%的水泥土强度达到最佳。而且根据实测的应力-应变曲线，详细地分析了掺砂水泥土的破坏形式为脆性剪切破坏，且随着掺砂量的增加，掺砂水泥土的剪切角逐渐增大。与此同时，还从不同的角度分析了掺砂水泥土无侧限抗压强度增长的原因，从而为工程应用提供了试验数据和理论依据。

Mechanical behavior of soil-sand-cement admixture

Through unconfined compressive strength test of soil-sand-cement in laboratory, its development rules in different sand contents and different curing ages are studied. The experimental results indicate that the mixing with a certain amount of sand can significantly increase the strength of cement-soil under a certain cement content condition. When the cement content is 10%, the sand content is 50% reaching maximum strength. And according to the measured stress-strain curves, through detailed analysis of the soil-sand-cement failure modes, it is brittle shearing damage. Moreover, with the increasing amount of sand content, the shear angle of the soil-sand-cement admixture increases gradually. At the same time, the reasons for unconfined compressive strength of soil-sand-cement admixture growth are analyzed from different viewpoints, so as to provide test data and theoretical basis for the practical application of engineering