Abstract
As the residue level of viscosity reducing in after mixing WMA would dynamic change with paving time and temperature, which should influenced on their compaction performance accordingly. The paper employed a improved variable-temperature control SGC compaction experiment to evaluate the compaction performance of four kinds of typical Warm-Mix Asphalt. In the paper, the compactibility at different temperature and the optimum compaction temperature were two way to represent different aspects of compaction performance. By experiment, the authors believed that the construction energy index is more suitable to express the compactibility than the slope of logarithmic fitting curve. And the authors proposed a equidensity –temperature method which based on analogous principle to determine the optimum compaction temperature. According to the experiment results, there are significant difference in the compactibility development trends and the optimum compaction temperature of different Warm-Mix Asphalt. The overall evaluation information of Warm-Mix Asphalt compaction performance could be get by the combination used of the compactibility development trends and the optimum compaction temperature which based on the improved variable-temperature gyratory compaction.
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