基于评价SBS改性沥青高温性能的修正软化点方法

发布时间：2018-05-24 20:39

本文选题：道路工程 + 软化点　；参考：《铁道科学与工程学报》2017年02期

【摘要】：为了获得与混合料高温性能相关的SBS改性沥青软化点评价方法,通过变化试验条件(加热介质、测试板距)分析不同结构类型和掺量的SBS改性沥青软化点变化规律,并进行SBS改性沥青混合料的车辙试验。试验结果表明:标准条件下的SBS改性沥青软化点与其混合料的高温性能没有直接关系,也很难鉴别不同SBS改性沥青之间软化点的差异。在对其试验条件修正为"测试板距10 mm,加热介质采用甘油",即修正软化点法后,所测得的环球法软化点可显著区分不同SBS改性沥青之间的差异,且与其混合料的高温稳定性能指标——动稳定度有良好的相关性。
[Abstract]:In order to obtain the evaluation method of the softening point of SBS modified asphalt related to the high temperature performance of the mixture, the change of the softening point of SBS modified bitumen with different structure types and content was analyzed by the changing test conditions (heating medium, test plate distance), and the rut test of the SBS modified asphalt mixture was carried out. The test results showed that the SBS modification under the standard conditions was changed. There is no direct relation between the softening point of the bitumen and the high temperature performance of the mixture, and it is difficult to distinguish the difference between the softening points of different SBS modified bitumen. The test conditions are revised to "the test plate distance of 10 mm, the glycerol in the heating medium", or the modified softening point method, the measured ring ball softening point can distinguish the different SBS modified bitumen. There is a good correlation between the difference and the dynamic stability of the mixture.
【作者单位】：长安大学特殊地区公路工程教育部重点实验室;西京学院;长安大学理学院;
【基金】：国家自然科学基金资助项目(51578076)
【分类号】：U414

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