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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。
Through the unconfined compressive strength test of indoor mixed sand soil, the development law of unconfined compressive strength under different sand content and different age conditions is discussed. Experimental studies show that: in a certain amount of cement mixed with a certain amount of sand, cement can significantly improve the strength. When cement content is 10%, the strength of cement soil with 50% sand content is the best. And according to the measured stress-strain curve, the failure mode of sand-mixed cemented soil is analyzed in detail as brittle shear failure. With the increase of sand loading, the shear angle of sand-soil cemented soil increases gradually. At the same time, the reasons for the increase of unconfined compressive strength of sand-mixed cemented soil are analyzed from different angles, which provides experimental data and theoretical basis for engineering application.