This test method covers the testing of asphalt pavement mixtures such as Warm Mix Asphalt (WMA), Hot-Mix Asphalt (HMA), and Polymer Modified Hot-Mix Asphalt to establish the relative workability (compactability) at paving temperatures. This test can be performed on a modified Superpave Gyratory Compactor (SGC) or other suitable loading frame meeting the requirements outlined in the apparatus section.
The value obtained in this test provides a relative index which ranks the behavior of the loose material related to the effort required to place and compact the material during construction. The index can indicate the relative temperature performance of materials and may be applicable for predicting appropriate production and construction temperatures. Lower production and construction temperatures may result in energy savings, lower emissions which reduce workers exposure to harmful vapors, and also contribute to the reduction in the release of pollutants to the environment. Results of materials tested at multiple temperatures used to predict lower paving temperatures can be applied to extend haul distances, expand ambient temperature limitations during placement (extend paving season), and determine construction requirements for proper placement without test strips to determine rolling requirements. The results may also be applicable for evaluating the warm mix additive levels and the effectiveness of such additives.
KeywordsBituminous paving mixtures, asphalt, compaction, workability, compactability, warm mix
The title and scope are in draft form and are under development within this ASTM Committee.Back to Top
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