粉砂改良土抗剪强度特性试验研究

通过无侧限抗压强度试验、直接剪切试验、三轴压缩试验,对纯砂和水泥改良粉砂的强度特性进行试验研究,结果表明:该粉细砂存在一定的黏聚力,其最优水泥的掺入比为3.5%;水泥掺入对粉砂来说主要体现在c值的增长上,对φ值的影响不明显;水泥改良粉砂的强度随着龄期的延长而增加。

Experimental Study on Shear Strength Performance of Cement-improved Silty Sand

The strength performance of pure sand and cement-improved silty sand is studied with unconfined compressive strength test,direct shear test and triaxial compression test. The test results show that the silty sand has certain cohesion,the best content of cement is 3. 5%; silty sand mixed with cement increases mainly the cohesion and influences less obviously the internal friction angle and the strength of cement-improved silty sand increases with curing age prolonged.