NAPA Explores New “Warm Mix Asphalt” Technologies Developed in Europe

Imagine producing and placing Hot Mix Asphalt pavement material at temperatures up to 100°F lower than currently considered feasible. Perhaps the most obvious benefit would be the reduction in fuel consumption, which would conserve precious natural resources.

In addition, production of asphalt fume would decline. The relationship of temperature to asphalt fume production has been confirmed by research at the National Center for Asphalt Technology and elsewhere. Experts say that, as the temperature of asphalt cement is raised, the amount of fume increases and the chemical makeup of the fume changes. With lower temperatures, both emissions and odors sometimes associated with asphalt are reduced or practically eliminated. Total emissions from asphalt plants, including greenhouse gases, would also be reduced.

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