水泥复合土的抗压强度试验研究

Experimental Study on Compressive Strength of Cement Mixed Soil

为了改善水泥土力学特性,设计了水泥复合土的配合比。采取正交试验方法,进行了水泥复合土的抗压强度试验,并通过极差分析和方差分析,研究了水泥掺量、膨润土掺量和粉煤灰掺量对水泥土抗压强度的影响大小和变化规律,建立了水泥复合土抗压强度随水泥掺量、膨润土掺量和粉煤灰掺量变化的回归方程。研究结果表明,随着水泥掺量的增加,水泥复合土的抗压强度逐渐增大;随着膨润土掺量的增加其抗压强度逐渐降低;对于粉煤灰掺量,其抗压强度在20%处达到最大。通过方差分析可知,水泥掺量对水泥复合土抗压强度的影响最大,其次为粉煤灰掺量的影响,膨润土掺量的影响最小。

In order to improve the property of cement soil in engineering,the proportion of cement mixed soil and experiments compressive strength test on cement mixed soil through orthogonal experiment were designd,and discussed the effects of cement content,bentonite content and fly ash content and change rules of cement mixed soil on mechanical behaviors of permeability cement mixed soil,establish the curve regression equation about the compressive strength of cement mixed soil varying with cement content,bentonite content and fly ash content through the poor analysis and variance analysis. The study results show that with the increase of cement content,compressive strength of cement mixed soil increased gradually; with the increase of bentonite content,the compressive strength of cement mixed soil gradually reduced; for fly ash content,the compressive strength of cement mixed soil reached the maximum at 20%. Through the analysis of variance shows that the cement content on compressive strength of cement mixed soil; followed by the influence of dosage of fly ash,the influence of the dosage of bentonite is minimal.