Abstract This study aimed to understand the microwave thermal regeneration mechanism of asphalt pavement and improve its regeneration quality. Asphalt mixtures containing moisture were regarded as a porous medium to study the multi-physical distribution law of asphalt mixtures in the microwave heating process. Mass and heat transfer models of moisture and a heat transfer model of asphalt mixtures were established. The variations in moisture in the asphalt mixtures were analyzed. The asphalt mixture with a high initial moisture content presented a fast migration rate of moisture. When asphalt mixtures with different initial moisture contents were dried to a certain extent, the moisture difference was reduced, along with the differences in moisture migration rates. The temperature variations of the asphalt mixtures were studied. The asphalt mixture with a lower initial moisture content presented a higher temperature rise than the other mixtures did after heating for the same duration. As the moisture of the asphalt mixtures decreased, the differences in the overall temperatures of the asphalt mixtures with different initial moisture contents showed a decreasing trend.

中文翻译：

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基于微波加热的含水沥青混合料多物理场研究

摘要 本研究旨在了解沥青路面微波热再生机理，提高其再生质量。以含水分沥青混合料为多孔介质，研究了微波加热过程中沥青混合料的多重物理分布规律。建立了水分的传质传热模型和沥青混合料的传热模型。分析了沥青混合料中水分的变化。初始含水量高的沥青混合料表现出较快的水分迁移速率。当不同初始含水量的沥青混合料干燥到一定程度时，水分差减小，水分迁移率也不同。研究了沥青混合料的温度变化。具有较低初始含水量的沥青混合料在加热相同持续时间后呈现出比其他混合料更高的温升。随着沥青混合料含水量的降低，不同初始含水量沥青混合料的整体温度差异呈减小趋势。