Abstract: Based on the asphalt rubber mixtures , the asphalt fi1m thickness in 5. 0% , 6.0% and 6.5% asphalt content was obtained by calcu1ation. The impact of minera1 fillers on the performance of asphalt rubber mixtures was analyzed. Cantabro test , moisture damage resistance test and f1exura1 fatigue test at 4 points were carried out in 1aboratory to identify the performance differences between mixtures with and without minera1 fillers , including the bonding performance , water damage resistant performance and fatigue performance. The test results indicate that Cantabro 10ss of mixtures with mineral fillers is 1ess than that of mixtures without minera1 fillers. And when the asphalt content is 6% and 6.5% in aspha1t mixtures , tensile strength ratio (TSR) of mixtures with minera1 fillers is 10wer than the mixtures without mineral fillers. However , fatigue results show that the fatigue pelformance of mixtures without mineral fillers is obvious1y better than that of mixtures with minera1 fillers. It is concluded that the use of mineral fillers in aspha1t rubber mixtures decreases the fatigue resistance , but increases the bond performance and water damage resistance slightly.

Key words: road engineering, asphalt rubber mixtures, minera1 fillers, asphalt fi1m thickness, fatigue performance

摘要： 基于橡胶沥青混合料，汁算得到5.0%,6.0%，6.5%等3种沥青用量下沥青膜厚度，分析了矿粉对橡胶沥青、鹿 合料沥青膜厚度的影响。通过肯塔堡飞散试验、冻融劈裂试验及四点弯曲疲劳试验，对比试验了加矿粉和不用矿粉 的橡胶沥青泪合料的秸结性能、抗水损害性能、疲劳性能，试验结果表明:掺加矿粉的橡胶沥青棍合料的飞散损失均 略低于不用矿粉的混合料;6.0%，6.5%沥青用量下，不用矿粉的级配对应的TSR值均小于加矿粉的级配;不用矿粉 的级配疲劳性能明显优于使用矿粉的两种级配。研究表明:橡胶沥青混合料中使用矿粉，可略提高其结结性能和抗 水损害性能，但对于其疲劳性能却是不利的。

关键词: 道路工程, 橡胶沥青混合料, 矿粉, 沥青膜厚度, 疲劳性能