ABSTRACT
Klamer, Hordijk & De Boer (2007) observed two types of failure in their work.The specimens at the lower range(up to 40◦C) failed due to concrete rupture leaving 1-3 mm of it on the adhesive layer, while at the upper temperature (50-75◦C) range the failure occurred between the concrete surface and the adhesive. The results were explained as the stiffness of the adhesive was reduced as approaching to the glass transition temperature (Tg) of the material. From another set of experiments three temperature related effects were found to affect the failure load: the difference in the coefficient of thermal expansion of CFRP and concrete, which caused initial thermal stress distribution in the concrete at the interface with the adhesive; the reduction of Young’s modulus with increase of temperature and the third effect was the reduced bond strength of the concrete-adhesive interface at elevated temperatures.
