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沥青混合料高温性能评价指标动稳定度(DS),易产生动稳定度值较大,而实际辙槽深度也较大的矛盾,因而提出了高温稳定指数(HTSI)指标,综合考虑行车速率、累积变形量和最大永久变形量等因素对压实沥青混合料高温性能的影响;表干法、水中重法和蜡封法等不同密度试验方法实测结果差别较大,因而提出综合考虑空隙率、吸水率与密度相关系数的适宜密度试验方法。结果表明:高温稳定指数考虑全过程的累积变形量和最大永久变形量,提高了沥青混合料高温性能评价的区分率;以相关系数作为判断指标,以空隙率确定沥青混合料不同密度测定方法,为合理选择沥青混合料密度试验方法提供了依据。
Asphalt mixture high temperature performance evaluation index dynamic stability (DS), easy to produce dynamic stability value larger, and the actual depth of the groove is also a big contradiction, and thus put forward the high temperature stability index (HTSI) indicators, considering the traffic speed, The cumulative deformation and the maximum amount of permanent deformation and other factors on the high temperature performance of compacted asphalt mixture; dry-dry method, water heavy method and wax seal method of different density test results vary widely, and thus put forward the comprehensive consideration of the porosity, Suitable density test method for the correlation coefficient between water absorption and density. The results show that the high temperature stability index considers the cumulative deformation and the maximum permanent deformation of the whole process, and improves the discrimination of high temperature performance evaluation of asphalt mixture. Using the correlation coefficient as a criterion to determine the different densities of asphalt mixtures, It provides the basis for choosing asphalt mixture density test method rationally.