Shear property demands of binding layer on concrete bridge pavement and simplified calculation

The mechanical properties of several types of binding layers on concrete bridge pavements were analyzed by using finite element method, and the sensitivities between their shear strengths and several pavement parameters including thickness, modulus, lateral load and tire pressure were studied. The range of shear angle was obtained and a simplified calculation equation for the shear strength of bonding layer between pavement and concrete bridge was put forward. By varying shear angle from 25° to 65° during inner-door skew shearing experiment, the varying rules of shear strength of bonding layer with temperature were analyzed. Research result indicates that the thickness and lateral load are main influence factors for shear strength and shear angle, the shear property of bonding layer decreases rapidly with the increase of test temperature and shear angle, and the use of low modulus waterproofing roll with a certain thickness is disadvantageous to shear property. The sticking effect of bonding layer can be judged by the comparison of testing values and calculating values of shear strengths at different paving sites, which can be used to supervise the selection of water proofing binding layer.