STUDY ON THE EVALUATION METHOD OF CONSTRUCTION JOINT AND INTERLAYER BONDING PROPERTIES OF ASPHALT PAVEMENT

Abstract

 In order to extend the life of asphalt pavement, it is important and the simplest way to increase the strength of interlayer bonding. However, there is no appropriate method to evaluate this property. In this consideration, we developed a half-section wheel tracking test, simulating a running vehicle at the cold joint, to measure the material used for. Specimens under traffic loads was used for both shearing and permeability tests, then, the adhesiveness and water stopping property were evaluated successfully. Regarding tack coat used for the interlayers, tensile adhesion test is commonly used, but there remain concerns about whether the adhesive strength could be evaluated properly. Therefore, we developed new equipment and testing method that repeatedly applied water pressure between the layers of the asphalt mixture. Reproduce of interlayer de-bonding phenomena by pressurized water, obtained the bonding properties of several type of tack coat.