Essais d'adhérence des époxydes au béton hydraulique

Abstract

The importance of techniques of repair and glued assembly of concrete structures is becoming increasingly obvious. The need to repair these structures arises from their age or construction defects. Polymers are now being used in glued assembly and repairs because of their adhesion quality which ensures bonding of hardened concrete-hardened concrete, hardened concrete-fresh concrete and hardened concrete-metallic concrete. This article presents two tests, one under direct tension and the other based on the principles of fracture mechanics. The latter offers the possibility of a more rigorous evaluation of the bond than direct tension tests. The author has determined the tensile strength and the energy recovery rate for the bond between hardened concrete and epoxy.