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The Representative Volumetric Parameter for Dense-Graded Asphalt Mixture

Volumetric parameters of asphalt mixture are essential for a better understanding of the properties of an asphalt mixture. This is even more applicable for a dense-graded asphalt mixture, where volumetric parameters have a significant correlation with its pavement performance, especially against rutting and moisture. This paper deals with the choice of the representative volumetric parameter for dense-graded asphalt mixture. A total of 6 volumetric parameters were studied. Volumetric analysis showed that linear correlation existed between any two of volumetric parameters. The change of volumetric parameters was mainly caused by the variation of gradation. The test result indicated that volumetric parameters were sensitive to the variation of gradation. The finding also indicated with the variation of gradation, the change rate of is the largest. Based on the research above, was selected as the representative volumetric parameter for dense-graded asphalt mixture.