Strengthening concrete using phosphate cement-based fiber-reinforced inorganic composites for improved fire resistance. (10th July 2019)

• Record Type: Journal Article
• Authors: Ding, Zhu; Xu, Mu-Rui; Dai, Jian-Guo; Dong, Bing-Qin; Zhang, Ming-Jie; Hong, Shu-Xian; Xing, Feng
• Is Part Of: Construction & building materials. Volume 212(2019)
• Page Start: 755
• Page End: 764
• Publication Date: 2019-07-10
• Subjects: Phosphate cement -- Fiber reinforced inorganic polymer (FRiP) composites -- Fiber-reinforced polymer (FRP) composites -- Fire resistance -- Concrete beam -- Strengthening; Building materials -- Periodicals; 624.18
• DOI: 10.1016/j.conbuildmat.2019.04.038
• Languages: English
• ISSNs: 0950-0618

Abstract

Graphical abstract: Highlights: The phosphate cement was used to produce fiber-reinforced inorganic polymer (FRiP) composites. The FRiP composites achieved excellent bonding performance with concrete substrate. The FRiP composites exhibited significantly improved fire resistance compared to FRP composites. Abstract: Fiber reinforced polymer (FRP) composites have been widely used for strengthening of concrete structures for many years. A critical concern for the FRP strengthening technology is the fire resistance. In this study, phosphate cement-based fiber-reinforced inorganic polymer (FRiP) composites were used to replace conventional fiber-reinforced polymer (FRP) composites to strengthen concrete beams for improved fire resistance. The performances of FRiP composites, FRiP-to-concrete interfaces and FRiP-strengthened concrete beams were examined both before and after fire exposure. It was demonstrated that the phosphate cement-based FRiP composites can significantly enhance the mechanical strength of the concrete beams. In addition, they exhibit much improved fire resistance as compared to the epoxy-based FRP composites.