Corrosion resistance of multiscale polypropylene fiber-reinforced concrete under sulfate attack

• DOI: 10.1016/j.cscm.2022.e01065
• Publication Date: 2022-04-12T18:20:43Z
• Authors: Ninghui Liang; Jinwang Mao; Ru Yan; Xinrong Liu; Xiaohan Zhou
• Keywords: Polypropylene; Fiber Reinforced Concrete

To study the corrosion resistance properties of multiscale polypropylene fiber-reinforced concrete (MPFRC) when subjected to sulfate attack, two types fine fiber (FPF) and one type coarse (CPF) were selected for single doping or hybridization into concrete. A sodium solution (10 wt%) was used in attack drying-wetting cycle. one-dimensional SO42- concentration distribution model established. The mechanism (PFRC) revealed based on compressive strength tests, ion micro tests under different ages. results showed that PFRC maintained its integrity even after being attack. After 20 cycles, MPFRC exhibited highest strength; double-doped at 18 mm depth 9.07% 9.52% lower than those plain single-doped concrete, respectively. could well describe characteristics diffusion coefficients (D) 30.0% 47.7% Thus, among specimens this study, best performance terms resistance.