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Minnesota's Cold Weather Road Research Facility

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Warm Mix Asphalt

 

What is Warm Mix Asphalt

Warm Mix Asphalt (WMA) is the generic term for any technology (additive or water foaming technique) added to an asphalt mixture that allows the mixing and compaction temperature to be reduced by 20 to 100°F. It allows the mix to remain workable at lower temperatures, and has potential environmental, operational, and performance benefits over traditional hot mix asphalt (HMA).

 

Benefits of Warm Mix Asphalt Thermal Imaging

Several benefits have been found when using Warm Mix Asphalt:

 

 

 

WMA Reference Documents

The documents below provide referential information as to the definition and usage of Warm Mix Asphalt:

 

WMA Presentations

The documents below provide several years of presentations by researchers about Warm Mix Asphalt: