Paving Fabric and Asphalt Stress Absorbing Membrane Interlayers (SAMI)

摘要

Geotextile paving fabric and two different asphalt rubber systems will each reduce or delay reflective cracking when used as an interlayer. One asphalt rubber system utilizes vulcanized rubber and the other system utilizes both devulcanized and vulcanized rubber. They are completely different systems with different procedures, temperatures, and methods of reducing viscosity of the hot asphalt rubber mixture. The interlayers are needed the most when using thin overlays. Proper crack sealing is important for the best utilization of interlayers and increased pavement performance.