Strength of copolymer grouting material based on orthogonal experiment |
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| Authors: | Yong-gui Chen Wei-min Ye and Ke-neng Zhang |
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| Affiliation: | (1) Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University, Shanghai, 200092, China;(2) School of Civil Engineering and Architecture, Changsha University of Science and Technology, Changsha, 410076, China;(3) School of Geoscience and Environmental Engineering, Central South University, Changsha, 410083, China |
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| 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 resin content, and waterborne epoxy curing agent content. By orthogonal range and variance analysis, the
orders of three factors to influence the strength, the significance levels of different factors, and the 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 resin content and waterborne epoxy curing agent content
also have a significant influence on the strength. But epoxy resin content has a greater influence on the 7-day and 28-day
flexural strength, and waterborne epoxy curing agent content has a 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.
Foundation item: Projects(40728003, 40772180, 40802064) supported by the National Natural Science Foundation of China; Project (07JJ4012)
supported by the Hunan Provincial Natural Science Foundation of China; Project(20080430680) supported by China Postdoctoral
Science Foundation; Project(B308) supported by Shanghai Leading Academic Discipline Project |
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| Keywords: | strength copolymer chemical grouting orthogonal method regression model |
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