作　　者： ; ; ;

机构地区： 长安大学公路学院特殊地区公路工程教育部重点实验室

出　　处： 《山东大学学报（工学版）》 2009年第2期125-130,共6页

摘　　要： 在环境作用下沥青易产生静态硬化和氧化硬化,使沥青的流变特性发生改变,而严重影响沥青路面的耐久性,如何合理评价和选择沥青对确保路面使用品质至关重要.通过3种不同基质沥青的组分分析和不同老化状态下沥青的常规试验(针入度、软化点和延度试验)、SHRP试验(DSR(Dynamic Shear Rheometer)和BBR(Bending Beam Rheometer)试验)结果比较,结合FTIR(Fourier Transform Infrared)红外光谱试验结果,分析了不同老化状态下基质沥青的老化特性和机理.结果表明,常规试验可用来描述基质沥青老化前后性能变化,但它只能提供特定温度荷载频率下的试验信息,而SHRP试验可全方位反映沥青老化对沥青流变行为的影响,建议采用SHRP流变学指标特别是BBR试验结果评价沥青的老化特性. The asphalt is easy to static harden and oxidative harden under environmental effects to induce its change of rheological characteristics, which can seriously influence the durability of asphalt pavement. Therefore, it is＇critical to reasonably evaluate and select the asphalt to ensure the quality of asphalt pavement. Based on the results of the components of three base asphalts and their conventional tests （penetration, soften point and ductility） and SHRP tests （DSR and BBR test）, the aging behavior and mechanism of base asphalts were analyzed based on the FTIR test. The results showed that although the conventional tests can describe the variations of base asphalts before and after asphalt aging, they can only provide the test message of specific temperature and load frequency. On the contrary, SHRP tests can reflect the influence of aging to the whole rheological behavior of base asphalt. Therefore, SHRP rheological indexes, especially BBR test results, were suggested as the evaluation indexes of the asphalt aging characteristic.

关 键 词： 老化行为 常规试验 试验 红外光谱试验 温度谱

领　　域： [交通运输工程]