An Introduction to Warm-mix Asphalt

Background

The hot-mix asphalt industry is constantly exploring technological improvements that will enhance the material’s performance, increase construction efficiency, conserve resources, and advance environmental stewardship. It is logical that
one approach to achieving these goals would involve methods to reduce material production temperatures. The concept of warm-mix asphalt has been introduced over the last few years as a means to these ends. Warm-mix asphalt is produced at temperatures in the range of 30o to 100oF lower than typical hot-mix asphalt (HMA).


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