Asphalt Industry Leader Briefs Congress on Expanding Implementation of Warm-mix Asphalt
NAPA President Mike Acott testified March 31, 2009 before a Congressional subcommittee that warm-mix asphalt is among the asphalt technologies with potential to reduce the impact of transportation infrastructure on the environment. The emphasis of the hearing by the House Subcommittee on Technology and Innovation was on climate change. Mr. Acott presented ideas for speeding the implementation of warm-mix technologies. Learn more.
Background: Warm-mix Asphalt, the Wave of the Future
Warm-mix asphalt is the generic term for a variety of technologies that allow the producers of hot-mix asphalt pavement material to lower the temperatures at which the material is mixed and placed on the road. Reductions of 50 to 100 degrees Fahrenheit have been documented. Such drastic reductions have the obvious benefits of cutting fuel consumption and decreasing the production of greenhouse gases. In addition, potential engineering benefits include better compaction on the road, the ability to haul paving mix for longer distances, and the ability to pave at lower temperatures.
Read more about the benefits of warm-mix asphalt 
Upcoming Events
- Check back soon for the latest WMA events!
Past Events
- The Warm-Mix Asphalt & Recycling Symposium was held June 8-10, 2009 at the Hyatt Regency in Sacramento, California.
Presentations covered results of field trials, accelerated performance testing, best practices at the plant and paving site, energy conservation, and emissions reductions. Also, presentations on recycling and energy focused on reclaimed asphalt pavement (RAP), recycling materials other than RAP, building Perpetual Pavements using rubblized bases, and plant operations. Perspectives from contractors, state DOTs and FHWA were included. Learn more.
- January 18-21, 2009 - NAPA's Annual Meeting
NAPA's Annual Meeting included a meeting of the Warm-Mix Asphalt Task Force, a workshop session on warm mix, and other educational programs of interest. Learn more about NAPA's Annual Meeting.
- November 11-13, 2008 - International Conference on WMA
More than 700 people from around the globe attended the International Conference on Warm Mix Asphalt in Nashville, Tennessee.
- July 16-18 - 2008 Pavement Performance Prediction Symposium, Laramie, WY
The symposium, presented by Western Research Institute in cooperation with the Federal Highway Administration, was dedicated to the topic of recycled and warm mix asphalt pavements.
- July 27-30 - NAPA's Midyear Meeting
The inaugural meeting of NAPA's Warm-Mix Asphalt Task Force took place at NAPA's Midyear Meeting in Colorado Springs, Colorado.
- May 7, 2008 - Caltrans District 5 Warm-Mix Asphalt Innovation Project Open House and WMA Workshop
This event was held at Morro Bay Community Center Auditorium in Morro Bay, CA. It included classroom sessions and a site visit. You may view the presentations here.
- May 6, 2008 - Warm-Mix Asphalt Technical Working Group Meeting
The FHWA/NAPA Warm-Mix Asphalt Technical Working Group met at The Cliffs Resort, Pismo Beach, CA, to develop a draft WMA specification with respect to materials, performance, and construction.
- January 28-29, 2008 - NAPA's Annual Meeting
Workshop sessions on warm mix focused on the state of the practice. Presentations are now available here.
- December 12-13, 2007 - WMA Technical Working Group Meeting
Many informative sessions were held on warm-mix asphalt.
View the presentations from this meeting here.
