ADHESION EFFECT OF SURFACE AND EVALUATION OF FATIQUE CHARACTERISTIC OF WET STATE RC SLAB USING SFRC OVERLAY METHOD

Abstract

In order to enhance the truck load capacity and fatigue property of RC slabs, the slab overlay method using steel fiber reinforced concrete（SFRC）has been proposed. In this study, the effects of adhesive coating on the load-carrying capacity and fatigue property of the slabs which were reinforced by SFRC overlay method was evaluated using wheel running fatigue test machine, especially when the rehabilitation applications are conducted under rainy condition. As results, the reinforcing effects of wet state slabs were as good as those of dry state ones, and the delamination between slab and the SFRC of wet state slab was not occurred until the deflection reached 1/400 of span L. The adhesion between slabs and SFRC was observed by using adhesive even when the application was conducted under surface water removed wet conditions.