聚合物改性水泥砂浆综合力学性能指标正交试验研究

The Experimental Study on the CMPI of Polymer Modified Cement Mortar by Orthogonal Design Method

聚合物改性水泥砂浆综合力学性能指标相比传统压折比可更加全面地反映复合材料改性后强度和韧性的改善。通过正交试验研究聚合物改性水泥砂浆的综合力学性能指标。考察水胶比、聚胶比、砂胶比及水泥矿硅比四个因素,采用L_(16)(4^(5))正交进行试验。结果显示:极差分析和方差分析结果表明各因素对聚合物改性水泥砂浆综合力学性能指标的影响显著程度次序不尽相同,且无重复试验方差分析所对应因素显著程度低于重复试验;重复试验的方差分析表明,砂胶比和聚胶比是综合力学性能指标的显著影响因素。

Compared with the traditional index(compressive to flexural ratio),comprehensive mechanical performance index(CMPI)is more comprehensive response the strength and toughness improvements of modified composite material.CMPI of polymer modified cement mortar ware studied based on the orthogonal experiment.Four factors as water-binder ratio,polymer-binder ratio,sand-binder ratio,cement-slag and silica afume ratio,and each factor had four level values.The experimental results ware conducted and studied according to the orthogonal table L_(16)(4^(5)).The results of variance analysis and range analysis show that the significant effect degree of the four factors on the CMPI was not the same,and the significant effect degree concluded from the variance analysis of repeated test data was larger,compared with the separate tests.The variance analysis of repeated test shows that sand-binder ratio and polymer-binder ratio had a significant effect on the CMPI of polymer modified cement mortar.