沥青低温性能评价指标的灰色关联度分析

为了改进和优化沥青的低温性能评价指标，采用灰色关联理论计算分析了改性沥青和不同老化程度沥青的延度、针入度等常见指标与美国SHRP计划的梁弯曲蠕变试验指标的关联度。结果表明，沥青的韧性比和15℃针入度与梁弯曲蠕变试验指标具有较高的关联度，能反映改性沥青和老化沥青的低温性能。研究结果可供低温地区选择沥青结合料时参考。

关键词：道路工程；灰色关联；沥青混合料；低温抗裂性；

Grey Relation Analysis of Low-temperature Performance Indexs of Asphalt Binder

Huang Bing Yan Kezhen Lin Feng

College of Civil Engineering, Hunan University, Changsha Hunan 410082

Abstract: The evaluation methods of anti-cracking performance of asphalt at low temperature are not unified. In order to reduce the pavement cracking, it is very important to find out the uniform evaluation index. This paper adopts the theory of grey relation degree to evaluate the low-temperature performance index of asphalt binder. The results show that it is feasible to take the toughness ratio or asphalt penetration index as the main index to evaluate low—temperature performance of asphalt binder. The results are important to reduce shrink cracking of asphalt pavement.

Key words: highway engineering; grey relation analysis; asphalt mixture; low-temperature anti-cracking performance