Effect of thermal aging on shear strength of concrete-epoxy interface in extreme moisture conditions

Abstract

A series of shear strength measurements are carried out, to study the effect of curing temperature and the effect of thermal ageing on the bond strength of concrete-epoxy interface. The results show that the curing temperature and water immersion play an important role. At early age, the shear strength of the samples cured at 40°C in air for 24h is more than twice the one at 20°C. The samples treated at 80°C in air could maintain a strong interface strength until 32 days, however, a drop due to interface debonding is observed for the samples treated at 80°C in water for 16 days.