Strength of copolymer grouting material based on orthogonal experiment
来源期刊：中南大学学报(英文版)2009年第1期
论文作者：陈永贵 叶为民 张可能
文章页码：143 - 148
Key words：strength; copolymer; chemical grouting;copolymers; orthogonal method; strength; regression model
Abstract: Using the orthogonal experimental design method involving three factors and three levels, the flexural strength and the compressive strength of copolymer grouting material were studied with different compositions of water-cement ratio (mass fraction of water to cement),epoxy resins content, and waterborne epoxy curing agent content. By orthogonal range and variance analysis, the orders of three factors to influence on the strength, the significance levels of different factors, and the optimization optimized compound ratio scheme of copolymer grouting material mixture at different curing ages were determined. An empirical relationship among the strength of copolymer grouting material, the water-cement ratio, the epoxy resin content,and the waterborne epoxy curing agent content was established by multivariate regression analysis. The results indicate that water-cement ratio is the most principal and significant influencing factor on the strength, epoxy resins content and waterborne epoxy curing agent content also have a significant influence on the strength. But epoxy resins content has a more greater influence on the 7-day and 28-day flexural strength, and waterborne epoxy curing agent content has a more greater influence on the 3-day flexural strength and the compressive strength. The copolymer grouting material with water-cement ratio of 0.4, epoxy resin content of 8% (mass fraction) and waterborne epoxy curing agent content of 2% (mass fraction) is the best one for repairing of cement concrete pavement. The flexural strength and the compressive strength have good correlation, and the ratio of compressive strength to flexural strength is between 1.0 and 3.3.
基金信息：the National Natural Science Foundation of China
Hunan Provincial Natural Science Foundation of China
China Postdoctoral Science Foundation
Shanghai Leading Academic Discipline Project of China
