四种道路沥青针入度-黏度模型的分析与比较

Analysis on Four Penetration-Viscosity Models of Paving Asphalt

介绍了四种道路沥青的针入度-黏度模型,以12种道路沥青为研究对象,采用表征沥青温度敏感性的粘温指数对四种模型的计算结果进行了分析和比较。结果表明:尽管各模型建立的方法不同,但是用来计算针入度对应的黏度值,并结合高温黏度回归得到的粘温指数结果基本一致。中、低温黏度的确定扩大了沥青温度敏感性的表征范围,更能反映沥青的实际使用情况。

Four penetration - viscosity models of paving asphalt were introduced in this paper. Twelve as- phalts were selected as the research objects. The calculations determined from the four models were analyzed and compared by viscosity- temperature susceptibility （VTS）, which characterized the temperature suscepti- bility of asphalt. The results indicated that although the bases of the four models were different, the VTS values which were obtained from the viscosities calculated from the four models and the viscosities at high tempera- tures were almost the same. The determination of viscosity at low and medium temperatures expanded the char-acterization range of temperature susceptibility for asphalt, which could reflect the real service condition of as-phalt.