拌合时间对掺Duroflex~抗车辙剂沥青混合料高温稳定性的影响

The performance analysis of mixing time basing on Duroflex~ conducted on asphalt rutting

为了探讨掺加Duroflex的沥青混合料拌合时间对其抗车辙性能的影响,对不同拌合条件下的AC-20C沥青混合料进行了车辙试验。试验结果显示,基质沥青和SBS改性沥青混合料的动稳定度都随着拌合时间的延长而降低;拌合时间从3min延长至11min时,基质沥青混合料动稳定度减低比率为49%,而SBS改性沥青动稳定度降低比率高达74%,SBS改性沥青掺加3%Duro的动稳定度降低比率为29%;不同拌合时间会对沥青混合料动稳定度产生较大影响,在同等试验条件下掺加Duroflex能够提高沥青混合料的动稳定度。

In order to explore the mixing Duroflex asphalt mixing time on their rutting re-sistance,rutting of AC-20C asphalt mixing conditions under different mixes were analyzed. Test results showed：the dynamic stability of asphalt and SBS modified asphalt mixture are mixing with the extension of time and reduced mixing time from 4 （4.5 ）min extended to 11min,the matrix asphalt mixture to reduce dynamic stability ratio was 49%,while the dy-namic stability of SBS modified asphalt reduction rate of up to 74%,SBS modified asphalt mixing dynamic stability Duro 3% reduction rate of 2 9%.Different asphalt mixing time will have a greater impact on dynamic stability,mixing Duroflex can improve the dynamic sta-bility of asphalt mixture under the same experimental conditions.