This standard practice for mix design evaluation uses aggregate and mixture properties to produce a hot mix asphalt (HMA) job-mix formula. The mix design is based on the volumetric properties of the asphalt mixture in terms of the air voids@ voids in the mineral aggregate (VMA)@ and voids filled with asphalt (VFA). This standard practice may also be used to provide a preliminary selection of mix parameters as a starting point for mix analysis and performance prediction analyses that primarily use T 320 and T 322. Special mixture design considerations and practices to be used in conjunction with this standard practice for the volumetric design of Warm Mix Asphalt (WMA) are given in Appendix X2. This standard practice may involve hazardous materials@ operations@ and equipment. This standard practice does not purport to address all of the safety concerns@ if any@ associated with its use. It is the responsibility of the user of this procedure to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.