The Research Of Stress Absorb Interlayers Technology

As a specific asphalt mixtures, Stress-Absorbing Interlayer is setting in pavement to postpone the process of reflective cracking reflect to the surface of pavement. It has a lot of preferable merit in postpone and prevent the Reflective Cracking in old cement concrete pavement rebuild project. It is becoming one of important technological schemes in adding asphalt overlay on the old cement concrete road surface.Linear fracture mechanics has been used in this paper to analysis the mechanism of reflective cracking, and the mix design process of Stress-Absorbing Interlayer has been written in the paper by study of mix design process of Superpave. In this paper, the performance of the stress-absorbing interlayer asphalt has been evaluated according to SHRP Performance Graded Specifications. We worked out the range of Stress-Absorbing Interlayer gradation according to Superpave. The performance of Stress-Absorbing Interlayer has been evaluated in the paper including low temperature anti-crack performance, fatigue performance, high temperature performance and the performance that resisted the water. In the end of the paper, the mix design of Stress-Absorbing Interlayer has been validated through test road, and then the construction technics and control of Stress-Absorbing Interlayer has been discussed.In the finality, the problems requiring further studies are discussed.