Asphalt Rubber Technology Information Center
Asphalt Rubber-Three Layer System Test Section, Second Annual Report
Author(s):
Webb, Mark  
Origin:
Missouri  
Date:
December, 1993  
Categories:
Performance  
Key Words:
Asphalt rubber  
Summary:
A portland cement concrete pavement was overlaid with a three-layer system consisting of ¾ inch of gap graded mix
with asphalt-rubber over the concrete followed with a ½ inch SAMI.  Surface is one inch of open graded friction course
with an asphalt-rubber binder.  The test section is to be maintained by the contractor for a period of three years.  With the
exception of formation of potholes from apparent debonding of the SAMI in the test section, performance of both
sections is about equal.  Warranty repairs were made by the contractor.  Noise level measurements indicated that
reported reduction of noise level in the test section could not be substantiated.
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