按PG性能等级规范评价国产重交通道路沥青的性能  

Evaluation on the Performance of Domestic Heavy-duty Paving Asphalt With the Superpave Performance Graded Specifications

作　　者：李志军[1] 王仁辉[1] 

机构地区：[1]抚顺石油化工研究院,抚顺113001

出　　处：《石油沥青》2002年第3期23-26,共4页Petroleum Asphalt

摘　　要：简单介绍了新修订的 PG性能等级规范由不同温度下的弯曲梁流变试验和直接拉伸试验数据得到临界开裂温度 ,进而确定沥青胶结料低温性能等级的方法。按照新规范规定的指标要求 ,对两种国产重交通道路沥青的性能进行了评价。结果表明 ,它们具有优良的高温稳定性、低温抗裂性和抗疲劳性能。同原规范相比 ,新规范在评价沥青胶结料的低温性能方面具有更好的科学性。The critical cracking temperature, which is obtained from bending beam rheometer (BBR) and direct tension test (DDT) data at different temperature, has been introduced into the new revised performance graded specifications to determine the low-temperature performance of the asphalt binders. The test method of determining the critical temperature was presented and the performance of two kinds of domestic heavy-duty paving asphalt was evaluated. The results indicate that their permanent anti-deformation, anti-fatigue cracking and anti-low temperature cracking performance are good; and the new method is better than the old one.

关 键 词：PG性能等级规范 评价 国产沥青 重交通道路沥青 性能 沥青胶结料 临界开裂温度 

分 类 号：U414[交通运输工程—道路与铁道工程]