微表处用水性树脂基改性乳化沥青流变性能

Rheological Properties of Waterborne Resin-Based Modified Emulsified Asphalt for Micro-Surfacing

机场道面微表处技术养护品质依赖于其胶结材料性能,为明确水性树脂聚合物掺量对微表处用改性乳化沥青流变特性的影响,制备了微表处用WER/WPU改性乳化沥青与WER/WPU/EVA改性乳化沥青,借助动态剪切流变试验、线性振幅扫描试验和弯曲梁流变试验,探明了不同水性树脂聚合物掺量下改性乳化沥青高温抗变形能力、中温疲劳性能与低温蠕变特性,对比分析了WER/WPU改性乳化沥青与WER/WPU/EVA改性乳化沥青的流变性能,并与现有研究中改性乳化沥青的抗变形、抗开裂能力进行了对比评价。结果表明:掺加树脂聚合物后乳化沥青材料的高温抗变形能力、中温疲劳寿命以及低温柔韧性得到有效提升,提升幅度随水性树脂聚合物掺量增加而提高;WER/WPU/EVA-15改性乳化沥青高温抗变形性能略优于WER/WPU-15改性乳化沥青,但其疲劳特性与低温抗裂性较WER/WPU-15改性乳化沥青略低。文中所研制的树脂基改性乳化沥青具有显著的先进性。

The technical maintenance quality of micro-surface for airport pavement is for the performance of its agglutination material to decide. In order to clarify the effect of water-based resin polymer content on the rheological properties of modified emulsified asphalt for micro-surfacing, WER/WPU modified emulsified asphalt and WER/WPU/EVA modified emulsified asphalt for micro-surfacing are prepared. With the help of dynamic shear rheological test, linear amplitude scanning test and bending beam rheological test, the high temperature deformation resistance, medium temperature fatigue performance and low temperature creep characteristics of modified emulsified asphalt under different water-based resin polymer content are proved. The rheological properties of WER/WPU modified emulsified asphalt and WER/WPU/EVA modified emulsified asphalt are compared and analyzed. The anti-deformation and anti-cracking ability of the modified emulsified asphalt in the existing research are compared and evaluated. The results show that the high temperature deformation resistance, medium temperature fatigue life and low temperature flexibility of emulsified asphalt material are effectively improved after resin polymer is being added, and the improvement range increases with the increase of water-based resin polymer content. The high temperature deformation resistance of WER/WPU/EVA-15 modified emulsified asphalt is slightly better than that of WER/WPU-15 modified emulsified asphalt, but its fatigue characteristics and low temperature crack resistance are slightly lower than that of WER/WPU-15 modified emulsified asphalt. The resin-based modified emulsified asphalt developed in this paper is significant advanced.