TOLERANCE OF BOND IN COMPOSITE-CONCRETE INTERFACE WITH VARIOUS ADHESIVES SUBJECTED TO HIGH TEMPERATURES

摘要

This paper presents the tolerance of bond between near-surface-mounted (NSM) carbon fiberrnreinforced polymer (CFRP) composite strips and a concrete substrate at high temperatures. Thernbonding agents used are ordinary and high-temperature epoxies. The performance of the CFRPconcreterninterface is studied when exposed to elevated temperatures ranging from 25 to 200oC.rnWhen thermal distress is applied the tolerance of the interface with the high-temperature epoxy isrnbetter than that of those with the ordinary epoxy; however, the latter shows superior behavior tornthe former without thermal loading. The interfacial strength of the specimens is governed by therninteraction between the bonding agent and the substrate.