利用多应力重复蠕变恢复(MSCR)方法评价改性沥青胶结料高温性能

Evaluation on High Temperature Performance of Modified Asphalt Binder with Multi Stress Repeated Creep Recovery(MSCR) Method

随着研究工作的不断深入和路面胶结料新材料的出现,尤其是改性沥青在公路施工中的大量使用,人们发现车辙因子（G＊/sinδ）与改性沥青混合料的抗车辙性能关联性不是很好,即用G＊/sinδ很难百分之百地预测改性沥青混合料的抗车辙性能.因此,采用了多应力重复蠕变试验中的指标：分析累积应变和蠕变劲度的黏性成分中的不可恢复的部分.为沥青胶结料的高温性能提供了更为合理的评价手段.

with the deepening of the research work and the emerging of new materials, especially modified asphalt largely used in highway construction, it was found that the correlation between rut factor （G＊/ sinδ） and anti-rutting performance of modified asphalt mixture was bad, the rutting factor was difficult to a hundred percent predict the anti-rutting performance of modified asphalt mixture. So the indexes of multi stress repeated creep test were adopted in this paper to analyze unrecoverable part of sticky ingredients of accumula- ted strain and creep stiffness. It provided a more reasonable evaluation method for high temperature perform- ance of asphalt binder.