基于PG值的机场道面沥青抗老化性能预估模型

发布时间：2018-06-17 05:14

  本文选题：老化 + 机场　； 参考：《建筑材料学报》2017年01期

【摘要】：从沥青老化机理出发,提出了预测机场道面沥青抗老化性能的预估模型.在标准大气压下针对1种基质沥青和2种改性沥青进行4种温度下不同时间段的老化处理,同时采用动态流变剪切仪(DSR)对沥青试样的PG上限温度值进行测试,研究其在老化作用下的变化规律.结果表明:3种沥青的PG上限温度值随老化条件的变化均存在一定的规律,但在相同老化条件下,沥青种类不同,其老化速率不同;无论是基质沥青还是改性沥青,其实测数据与预估模型吻合良好,PG上限温度值可作为评价机场沥青道面抗老化性能的指标.
[Abstract]:Based on the aging mechanism of asphalt, a prediction model for predicting the aging resistance of airport pavement asphalt is proposed. Under standard atmospheric pressure, one kind of matrix asphalt and two kinds of modified asphalt were aged at 4 different temperatures, and the upper limit temperature of PG was measured by dynamic rheological shear apparatus (DSRs). The law of its change under the action of aging was studied. The results show that the upper temperature of PG of three kinds of asphalts varies with aging conditions, but under the same aging conditions, the aging rate of asphalt is different with different kinds of asphalt, whether it is base asphalt or modified asphalt. In fact, the measured data agree well with the predicted model and the upper temperature value of PG can be used as an index to evaluate the anti-aging performance of airport asphalt pavement.
【作者单位】： 南京航空航天大学民航学院;南京航空航天大学航空宇航学院;西安建筑科技大学土木工程学院;
【基金】：国家自然科学基金资助项目(51108375) 2013年国家建设高水平大学公派研究生项目
【分类号】：U414;V351.11
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本文编号：2029869