Properties of High-Performance Materials for the Crack Repair of Segment Structures

Xuewei Sun, Jianjun Zhong, Peiwei Gao (), Guoqing Li, Dingkan Xiao, Zhixiang Zhang and Ting Gan
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Xuewei Sun: Department of Civil and Airport Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Jianjun Zhong: Department of Civil and Airport Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Peiwei Gao: Department of Civil and Airport Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Guoqing Li: Department of Civil and Airport Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Dingkan Xiao: Department of Civil and Airport Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
Zhixiang Zhang: SinoRoad Transportation Science and Technology Co., Ltd., Nanjing 211800, China
Ting Gan: SinoRoad Transportation Science and Technology Co., Ltd., Nanjing 211800, China

Sustainability, 2023, vol. 15, issue 22, 1-17

Abstract: In order to improve the crack repair effect of high-performance segment structure crack repair materials, in this paper, we used the orthogonal test research method of four factors and three levels to analyze changes in the microstructure of crack repair materials under different material compatibility levels, followed by analysis through the performance testing of repair materials. The flow performance, setting time, compressive and flexural strength, and bonding and tensile strength were studied. The results show that (1) excessively thick epoxy polymer film affects the bond strength, an appropriate increase in the polymer–cement ratio can promote the hydration of cement, and an appropriate increase in gel material can enhance the repair function of repair material; (2) the setting time clearly increases with increases in the polymer–cement and water–cement ratios and the decrease range clearly increases with an increase in the water–cement ratio; (3) the adhesive flexural strength of epoxy polymer repair material increased the most in 28 days; and (4) the bonding tensile strength of the repair material increases first and then decreases with increases in epoxy polymer content. An appropriate increase in the polymer–cement ratio can promote cement hydration.

Keywords: cracks; microstructure; mechanical properties; poly–ash ratio; water–cement ratio (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2023
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