Evaluation of Asphalt-Rubber Seal Coats and Interlayers for Rehabilitation of Flexible Pavements - Demonstration Project 37 - Final Report Author(s): Gulden, Wouter, P.E. Origin: Georgia Date: September, 1982 Categories: Performance Key Words: seal coats, interlayers, asphalt-rubber, reflective cracking Summary: The Georgia DOT placed an asphalt-rubber seal coat section on SR-37 in Calhoun County and an asphalt-rubber interlayer section on SR-20 in Cherokee County in 1976 as part of FHWA Demonstration Project No. 37. An Additional asphalt-rubber interlayer section was placed on AR-20 in 1978 using a different rubber composition. The performance trends indicate that the asphalt-rubber seal coat performed better in reducing reflective cracking than the control section consisting of a double surface treatment, but not as well as a triple surface treatment section. The asphalt-rubber interlayer also reduced the occurrence of fatigue type reflective cracking on the overlay based on visual observations. Two of the four fabric sections placed for comparison purposes also reduced the reflective cracking.