Bond strength of FRP-to-concrete joints under moist conditions

Adhesively bonding fibre-reinforced polymer (FRP) composites to concrete structural elements for strengthening has largely been successful since adoption from the aviation industry in the early 1990s. However, uncertainty of the long-term durability of the critical bond between the FRP and concrete has instigated widespread push-pull testing across a range of simulated in-service environmental conditions, specimen geometries and materials. A comprehensive database of bond tests is quantitatively assessed to determine and predict the role of moisture on joint strength across a range of studies previously only considered in isolation.