高延性水泥基复合材料(ECC)正交试验

Orthogonal Test of High Ductility Engineering Cementitious Composites (ECC)

摘要: 本文利用正交试验设计原理，开展了9组高延性水泥基复合材料(ECC)的坍落度、立方体抗压强度、劈裂抗拉强度和抗折强度试验，研究了硅灰、改性脱硫石膏、膨胀剂和减水剂四种因素对ECC物理、力学性能的影响，并采用多元线性回归的方法，建立了ECC的性能预测模型。试验结果表明：最优组为硅灰掺量20%，脱硫石膏掺量4%，膨胀剂掺量6%，减水剂掺量1.9%；通过对正交试验的结果进行回归分析，得出了ECC物理、力学性能预测模型，模型精度较高。

Abstract: In this paper, using the orthogonal experiment design principle, carry out 9 groups of high ductility Engineering Cementitious Composites (ECC) of the slump, cube compressive strength, splitting tensile strength and flexural strength test, study the effect of silica fume, modified desulfurization gypsum, expansive agent and water reducing agent of four factors on the physical and mechanical properties of ECC, and adopt multiple linear regression method. The performance prediction model of ECC was established. The results show that the optimal group is silica fume content of 20%, desulfurization gypsum content of 4%, expansion agent content of 6%, and water reducing agent content of 1.9%. The ECC physical and mechanical properties prediction model is obtained by regression analysis of the orthogonal test results, and the model has high precision.