A number of new processes have been developed to allow asphalt mixtures to be mixed and compacted at lower temperatures. These processes tend to reduce the viscosity of the mixture at mixing and compacting tempratures. Collectively, these processes are referred to as warm mix aspahlt (WMA). In an effort to evaluate WMA technologies, contractors and agencies have constructed or are planning to construct trial sections. When considering a WMA trial, a minimum desired test section would be 800-1000 tons of WMA. This will allow a plant run of approximately four hours at reasonable production rates. Further, it is desirable to have a hot mix control section to be produced using the same mix design (without the WMA additives).

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