NCAT says early WMA performance is favorable
Oct 19, 2010
In the Asphalt Technology e-News for Fall 2010, NCAT publishes some initial findings of their warm mix evaluations. These field trials are alleviating some concerns about rutting and moisture susceptibility by not showing any practical difference between WMA and HMA control sections. There is a case study that used Evotherm in Missouri that exhibits no appreciable rutting or moisture damage in any of the WMA or HMA sections after two years of heavy traffic. In Ohio, WMA sections with Evotherm performed as well as or better than HMA control mixes in laboratory testing for rutting and moisture susceptibility (Asphalt Pavement Analyzer, Hamburg rut testing and tensile strength ratio). Adding 30-50% energy savings and up to 97% job-site emissions reductions to these performance attributes puts Evotherm in a class by itself.
Author: Heather Dolan
