Experimental Project Using Rubber Asphalt Membrane to Retard Reflection Cracking Author(s): Meadors, Alan Origin: Arkansas Date: July, 1986 Categories: Performance Key Words: Asphalt-rubber, SAM, SAMI, cracking Summary: An asphalt rubber membrane was used as a stress absorbing membrane (SAM) and as a stress absorbing membrane interlayer (SAMI) over a jointed concrete pavement. This project is located on Interstate 30 in Little Rock. Approximately 5 years after the asphalt rubber membrane was placed, the project was surveyed with the following results: 1. The control section showed 25% of the joints has reflected through. 2. The SAM section averaged 25% joint reflection. 3. The SAMI section averaged 20% joint reflection.
The results indicate that the use of a SAM and/or SAMI was not effective in retarding joint reflection cracking.