CAJ | 학술논문

SBR 改性沥青具有良好的低温抗裂性能和高温稳定性，但过高的沥青混合料拌和温度容易导致 SBR 胶粉的老化和离析，降低其性能。文中在对 SBR 胶粉直投改性沥青性能测试的基础上，引入温拌技术对 SBR 改性沥青及混合料的性能进行改善。通过对 SBR 胶粉温拌直投改性沥青及其混合料的性能试验测试表明，室内直投方法制备的 SBR 改性沥青老化后的延度指标较差，但温拌后 SBR 改性沥青的各项性能指标得到显著提升，而且沥青混合料的各项指标均较为稳定，高低温性能改善明显，达到甚至好于 SBS 改性沥青。
SBR 개성력청구유량호적저온항렬성능화고온은정성，단과고적력청혼합료반화온도용역도치 SBR 효분적노화화리석，강저기성능。문중재대 SBR 효분직투개성력청성능측시적기출상，인입온반기술대 SBR 개성력청급혼합료적성능진행개선。통과대 SBR 효분온반직투개성력청급기혼합료적성능시험측시표명，실내직투방법제비적 SBR 개성력청노화후적연도지표교차，단온반후 SBR 개성력청적각항성능지표득도현저제승，이차력청혼합료적각항지표균교위은정，고저온성능개선명현，체도심지호우 SBS 개성력청。
SBR modified asphalt has good low temperature cracking resistance and high temperature stability,but the SBR powder easily leads to aging and isolation when the asphalt mixing stirring at high temperature,which may reduce its performance.In this paper,based on the performance tests of SBR powder direct inputting to preparation SBR modified asphalt,warm mix technology were intro-duced to improve the performance of SBR modified asphalt and its mixture.Test results show that the ductility index of SBR modified asphalt by live inputting in the laboratory is poor,but all the indica-tors of SBR modified asphalt are significantly improved after warm mixing,the indicators of asphalt mixture are stable,and high temperature performance was improved significantly,even better than SBS modified asphalt.