Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 212, Issue -, Pages 755-764Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2019.04.038
Keywords
Phosphate cement; Fiber reinforced inorganic polymer (FRiP) composites; Fiber-reinforced polymer (FRP) composites; Fire resistance; Concrete beam; Strengthening
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Funding
- National Natural Science Foundation of China [51472163, 51538007, 51478406, U1801254]
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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. (C) 2019 Elsevier Ltd. All rights reserved.
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