Asphalt Rubber-Three Layer System Test Section, First Annual Report Author(s): Webb, Mark Origin: Missouri Date: June, 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 following with a ½ inch SAMI. Surface is one inch of open graded friction course with an asphalt-rubber binder. Very few reflection cracks were observed in the test and control sections. Some potholes and mild reveling have appeared in the test section. Friction values for the control are slightly higher than the test section.