Strengthening concrete using phosphate cement-based fiber-reinforced inorganic composites for improved fire resistance

[Display omitted] •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. Fiber...

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Bibliographic Details
Published in:Construction & building materials 2019-07, Vol.212, p.755-764
Main Authors: Ding, Zhu, Xu, Mu-Rui, Dai, Jian-Guo, Dong, Bing-Qin, Zhang, Ming-Jie, Hong, Shu-Xian, Xing, Feng
Format: Article
Language:English
Subjects:
Concrete beam
Fiber reinforced inorganic polymer (FRiP) composites
Fiber-reinforced polymer (FRP) composites
Fire resistance
Inorganic polymers
Phosphate cement
Phosphates
Polymer industry
Polymers
Strengthening
Technology
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Summary:[Display omitted] •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. 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.
ISSN:0950-0618
1879-0526
DOI:10.1016/j.conbuildmat.2019.04.038