ABSTRACT
The stress-absorbing layer is arranged on the general cement concrete deck and asphalt surface layer, which can effectively disperse the stress concentration of cement concrete joints or cracks under load effect in order to delay or prevent the appearance of reflective crack of asphalt pavement. The commonly used stress-absorbing layer types mainly include the layer distribution method stress absorbing layer (such as SAMI), modified asphalt mixture stress absorbing layer, the compound stress absorbing interlayer, geosynthetics, and synchronous macadam transition layer, among which the first three have better impermeable, crack resisting, and bonding properties, whereas the effect of the latter two in the practical application is not significant. The cost of modified asphalt stress absorbing layer and compound stress absorption interlayer engineering is high, and the difficulty of construction is relatively high. By contrast, the layer distribution method stress absorbing layer is relatively more economical, reasonable, and convenient for construction. Rubber powder-modified asphalt with high elasticity, toughness, and high deformation is
In addition to the rubber powder-modified asphalt stress-absorbing layer structure of each layer of compressive resilient modulus and Poisson’s ratio, we refer to “asphalt pavement design specification” -JTG D50-2006 value. However, the rubber powder-modified asphalt stress-absorbing layer refers to the modified asphalt stress-absorbing layer parameters. The values of the pavement material parameters for each layer are shown in Table 1.
