摘要
对比分析了多种国际品牌沥青与国产品牌沥青的感温性能之间的差异,结果表明,中国针入度指数PIpen评价沥青温度敏感性存在明显的缺陷,国际针入度指数PIpenR&B与中PIpen之间无明显的相关性,PIpenR&B变化趋势更接近于针入度粘度指数PVN,进而印证了采用PIpenR&B作为评价沥青的温度敏感性更为科学合理;试验沥青蜡含量与实测软化点之间无明显的线性相关性,说明PIpenR&B与PIpen之间差异并不是由于蜡含量对软化点的影响造成,两种方法计算PI值的不同并非充分来源于软化点差异;采用指数函数评价沥青在不同温度下表现不同流变特性具有较好的适应性。
The paper comparatively analyzed susceptibility differences about some international asphalt brands and domestic asphalt brands. The results showed that an obvious defect of China＇s Penetration Index （PIpen） in evaluating the asphalt temperature sensitivity. The International Penetration Index （PIpen R＆B） and PIpen had no significant correlation, however, the curvilinear trend of PIpen R＆B was closer to that of penetration viscosity index （PVN）, which confirmed PIpen R＆B as the asphalt temperature sensitivity evaluation was more scientific and rational. ;ccording to the test result that the wax content and asphalt softening point had no significant linear correlation, the differences between PIpen R＆ B and PIpen is not from the effect of the wax content on asphalt softening point, and PI difference of two calculation methods is not sufficient from the asphalt softening point difference; applied the exponential function had good adaptability evaluating asphalt rheological properties at different temperatures.
出处
《安徽建筑工业学院学报（自然科学版）》
2010年第4期20-24,共5页
Journal of Anhui Institute of Architecture(Natural Science)
基金
安徽省2005年交通科技进步计划项目(发改交运[2005]1247号)
