Abstract:The research and application of increasing the amount of rubber powder in rubber asphalt are increasing, in which the large amounts of rubber asphalt are suitable for the application scenario of synchronous crushed stone sealing layer, which can effectively play a functional role in stress absorption and fully utilize the excellent elasticity and fatigue characteristics of large amounts of rubber powder. This rubber asphalt synchronous crushed stone sealing layer with large amounts of rubber powder is based on the shear resistance between layers, and through research and comparison of material properties, dosage and road performance. The theoretical method and the mechanical-empirical design method are used to design the mix ratio of synchronous crushed stone lower sealing layer. With the interlayer shear strength as the design index, the oblique shear tests will be selected to simulate the composition design test of large-amount rubber asphalt synchronous crushed stone sealing layer material. And compared with the performance of using 18% rubber asphalt as a crushed stone seal layer at a normal dosage, the application of large-amount rubber asphalt in synchronous crushed stone seal layers is achieved, which solves the problem of reflection cracks in semi-rigid base layers, and achieve the high-quality and efficient reuse of waste tires for basic technical reserves. The experimental results show that the mechanical empirical method or the theoretical method can be used to design the high-performance large-amount rubber asphalt synchronous crushed stone sealing layers, with little difference between the two. Compared with 18% rubber asphalt used for crushed stone sealing layers, the large-amount rubber asphalt synchronous crushed stone sealing layer has the high tensile strength, shear strength, and dynamic stability.
