various additives 36-month research project is to develop a performance-based mix design procedure for WMA in the form of a draft AASHTO recommended practice.Warm-mix asphalt is an innovative asphalt concrete produced at temperatures about 20˚C - 40˚C lower than those employed in the production of conventional hot-mix asphalt and yet still have at least the same properties as conventional hot-mix.1. Warm up the mix plant to normal production tempera-tures. This insures that all the plant's material handling equipment is at appropriate operating temperatures. 2. Begin warm mix asphalt (WMA) production gradually and lower the mix temperature to within + 10°F of the WMA target temperature. 3. Check loaded transports to assure that the ...OPTIONAL USE OF WARM MIX ASPHALT (WMA) TECHNOLOGIES The contractor has the option of using an Approved WMA Technology in the production of all 402,
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