Research and Development of New Heat Resisting FRP Bars
By Atsushi Sumida, Hiroshi Mutsuyoshi
Concrete Research and Technology
Vol.17, No.3, Sep. 2006 (Issue 42)
- Synopsis:
- This paper presents the development of new heat resisting fiber reinforced polymer (FRP) bars and their application for the concrete members. Experiments were conducted on commercially available FRP bars and newly developed carbon and aramid FRP bars impregnated with PH (phenol) and CP (cross-linked polyesteramide resins). Heat resistance tests, alkaline durability tests, pullout tests of FRP bars and flexural tests of FRP reinforced concrete beams at various temperatures were carried out. It was observed that newly developed FRP bars impregnated with PH show high heat resistance and less deterioration of bond strength at high temperature than the other FRP bars. The concrete beam reinforced with FRP bar composed of carbon fiber impregnated with PH shows an excellent performance at high temperature which is comparable to that reinforced with steel bars. FRP bars impregnated and cured with PH also showed a good alkaline durability.
- Keywords:
- fiber, phenol resin, FRP bar, heat resistance, bond strength, alkaline durability
