作　　者： ; ;

机构地区： 东南大学交通学院

出　　处： 《公路》 2006年第7期145-148,共4页

摘　　要： 为探讨油石比和空隙率对沥青混合料高温性能的影响，对AC-20改进型沥青混合料进行单轴静载蠕变试验研究。结果表明：流变时间凡值与混合料高温稳定性有较好的相关性，凡值越大，混合料的高温抗变形能力越好；柔量～时间半对数曲线直线部分的截距a值和斜率m值越大，混合料的高温性能越差，相关性相对较差；当空隙率大于4％时，空隙率越小，混合料高温性能越好；在最佳油石比下，混合料具有较好的高温性能。 A static uniaxial creep test is implemented to investigate the influence of the void ratio and the asphalt-aggregate ratio on the stability at high temperature of modified AC -20I asphalt mixture. The results indicat that the relativity between the F, and the stability at high temperature is fine and the greater the Ft, the better the stability at high temperature; on the contrary, the greater the intercept and slope of the compliance-time semi-logarithm curve, the worse the stability of high temperature, but the relativity is not good. When the void ratio is more than 4%, the less the void ratio, the better the stability at high temperature ; under the optimum asphalt content, the mixture has a better stability at high temperature.

关 键 词： 沥青混合料 单轴静载蠕变试验 空隙率 油石比 流变时间

领　　域： [交通运输工程]