Cement Concrete Pavement Rapid Thin-layer Repair Research

The rapid repairing method using cement concrete lamina is a new method of repairing concrete pavement. This method accepted by many researchers can make use of residual strength and modulus of used pavement, increasing pavement structure carrying capacity and renewing pavement surface performance, at same time, reducing costs and shortening repairing time. In this paper, the rapid repairing method using cement concrete lamina is presented, two key designing parameters are analyzed: The interfacial bonding strength of new and used concrete and the shearing stress in interface. Through the experiment of the interfacial bonding shear strength and the shrinkage strain of concrete, the influence of the interfacial roughness of used concrete surface and interfacial bonding agent to interfacial bonding strength is revealed; new concrete component and the shape and size of concrete slab are main factor affecting the shearing stress in layers. At last, the approach of increasing bonding strength and decreasing shearing stress is presented.