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The contents of this report reflect the views of the author(s), who is responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Virginia Department of Transportation, the Commonwealth Transportation Board, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Any inclusion of manufacturer names, trade names, or trademarks is for identification purposes only and is not to be considered an endorsement.


Evaluation of Asphalt Rubber Stress-absorbing Membrane
Payne, Charles W.
G. W. Maupin, Jr.
Year: 1997
VTRC No.: 98-R11
Abstract: This report describes the construction and evaluation of a stress-absorbing membrane (SAM) using a liquid asphalt binder containing ground tire rubber. Approximately 10 lane-km of SAM and 4 lane-km of control surface treatment for comparison were constructed in 1992. There was excessive loss of coarse aggregate under traffic on the SAM section, resulting in broken windshields. Although aggregate loss was significant, friction values were generally satisfactory. SAM was effective in keeping cracks of the underlying surface sealed. Because it appears difficult to determine and use the proper amount of binder to prevent aggregate loss and bleeding, the authors recommend that SAMs not be pursued further as a method of surface treatment in Virginia.