荒漠地区橡胶改性沥青老化性能试验分析

Analysis of long-term ageing properties of rubber modified asphalt in desert areas

沥青老化性能试验是评价沥青路面材料使用寿命的重要方法.通过采用旋转薄膜烘箱实验(RTFOT)后残留针入度、延度试验、动态剪切流变试验(DSR)方法,得到了荒漠地区橡胶改性沥青短期、长期老化规律.结果表明:RTFOT短期老化残留针入度:橡胶改性沥青>苯乙烯一丁二烯-苯乙烯嵌段共聚物(SBS)>克拉玛依(克)90号基质沥青;相位角δ:橡胶改性沥青DSR试验<SBS改性沥青<基质沥青.抗老化性能压力老化实验(PAV):橡胶改性沥青>SBS改性沥青>克90号基质沥青.研究得出掺入橡胶粉可明显提高沥青的抗变形、抗老化性能,可为废旧橡胶粉掺入路用沥青提供科学的理论支撑与技术指导.

Asphalt ageing test is an important method to evaluate the service life of asphalt pavement. By using the RTFOT residual penetration and delay test,DSR dynamic shear rheological test method the rubber modified asphalt short-term and long-term ageing rules in desertarea were obtained. The results showed that the rubber modified asphalt RTFOT short-term aging residual penetration〉SBS modified as- phalt residual penetration〉G No. 90 asphalt residual penetration ; rubber modified asphalt DSR test phase angle Delta〈SBS change sex asphalt〈matrix asphalt phase angle Delta. Rubber modified asphalt PAV ageing properties〉SBS modified asphalt anti-aging properties〉G No. 90 asphalt anti-ageing performance. The research showed that the addition of rubber powder could obviously improve the anti deformation and anti aging properties of asphalt. Research results could provide scientific theoretical support and technical guidance approach for the waste rubber powder mixed with asphalt.