正交试验法在水泥固化剂稳定土配合比设计中的应用

Application of the Orthogonal Test to the Mix Design of Soil Stabilized by Cement and Solidifying Agent

采用正交试验的方法,对一种水泥固化剂稳定土进行配合比设计,并对试验结果进行极差分析与方差分析,研究水泥掺量、固化剂掺量、压实度对水泥固化剂稳定土抗压强度的影响,结果表明:水泥掺量对材料的强度影响最大,固化剂次之,压实度对强度影响较小;综合考虑技术、经济等因素,水泥掺量为4%、固化剂掺量为4%、压实度为97%的水泥固化剂稳定土适合作为二级或二级以下公路底基层材料。通过多元线性回归分析,建立了抗压强度与水泥掺量、固化剂掺量、压实度的线性回归模型。

By the method of orthogonal test,some mix proportions of cement and solidifying agent in soil are designed.And materials with proportions designed are investigated through range analysis and variance analysis in order to find out the impact of cement content,dose of solidifying agent and compactness on the compressive strength.The result shows that among the three factors,cement content has the greatest effect,while the dose of solidifying agent exerts less and compactness the least influence on the compressive strength.Taking technology and economy into consideration,the soil in which the proportion of cement and solidifying agent reach 4%respectively and whose degree of compaction increases to 97%,is suitable to be used as the material of second-class or below highway sub-base.A linear regression model is built through multiple linear regression analysis to explain the relationship between compressive strength and cement content,dose of cuing agent and compactness.