Interface debonding performance of precast segmental nano-materials based concrete (PSNBC) beams

Abstract

The precast segmental concrete (PSC) structures and the nano-materials based concrete beams are widely applied to civil engineering. On the other hand, it is well known that nano-materials have physical effects and can significantly improve the concrete properties of cement-based materials. Therefore, the interface debonding performance of precast segmental nano-materials based concrete (PSNBC) beams is investigated in this study. Two concrete specimens with nano-materials and one concrete specimen without nano-materials were prepared and bonded into PSC beams with a high strength epoxy adhesive. The smart aggregates (SAs) made of piezoceramic Lead Zirconate Titanate (PZT) and concrete are used as the intelligent transducer of monitoring test specimen. The PSC beam was loaded periodically by screw jack to simulate the random debonding damage of different degrees. The experimental results show that the interface debonding performance of the concrete specimens with nano-materials is significantly enhanced and better than that of concrete specimens without nano-materials.