Asphalt Rubber Technology Information Center
Analytical Study of Minimization of Reflection Cracking in Asphalt Concrete Overlays by Use of a
Rubber-Asphalt Interlayer
Author(s):
Coetzee, N.F. and Monismith, C.L.  
Origin:
California  
Date:

Categories:
Performance  
Key Words:

Summary:
A finite element analysis concluded that a low modulus interlayer such as asphalt-rubber can be significant in the
inhibition of reflection cracking resulting from load and temperature.  The study focused on crack tip stress and showed
that crack width interlayer modulus and overlay thickness have a significant effect on this stress, but the ratio of overlay
modulus to cracked layer modulus was determined to be the major factor.  The asphalt rubber binder was characterized
using constant stress creep and constant rate-of-strain tests.
© 2015 - Rubber Pavements Association (RPA). All rights reserved.