Abstract
The bonding properties exhibited by high-strength steel wire mesh reinforced polyurethane cement (HSSWM-PUC) and concrete interface were investigated. A total of 27 specimens with HSSWM-PUC as the reinforcement material were assigned into nine groups, and six specimens with high-strength steel wire mesh reinforced polymer mortar (HSSWM-PM) as the reinforcement material were assigned into two groups. Double-sided shear test was performed out on the specimen. The factors for concrete compressive strength, interfacial bond width, interfacial bond length and different interfacial treatment methods were considered in the experiment. The mechanical properties (e.g., interface failure mode, interface shear-end slip curve, interface peak shear and corresponding end slip) were investigated after the test was performed. As indicated by the results, there were two failure modes of bonding between HSSWM-PUC and concrete interface, i.e., peeling failure in the concrete layer and tensile fracture of the steel strand. The interface shear-end slip test curve displayed three stages, i.e., linear slip growth stage, rapid slip development stage and slip instability growth stage. The interfacial bond property can be enhanced by strengthening the compressive strength for concrete or increasing bond length and width on bond performance. The bonding properties exhibited by the specimens administrated with grooves were obviously better than those administrated with deep and shallow gouges. Interface stripping failure served as the main interface bonding failure mode between HSSWM-PM and concrete. Under the identical interface treatment, the interface bonding property between HSSWM-PM and concrete was obviously worse than that between HSSWM-PUC and concrete.