基于长期老化作用的再生混合料路用性能试验研究
摘要
高RAP掺量的再生沥青混合料的长期路用性能成为当前沥青路面再生技术关注的焦点。在室内设计85%RAP掺量的再生沥青混合料,采用长期烘箱加热法在85℃烘箱加热5 d和10 d对其进行模拟老化,然后采用动态蠕变试验、半圆弯曲试验和冻融劈裂试验对再生混合料的路用性能进行评价,结果表明:长期老化作用下,再生混合料的抗车辙性能增强,低温抗裂性能和抗水损害性能下降;与新沥青混合料相比,再生混合料在长期老化作用下具有较大幅度的抗车辙性能提升和低温抗裂性能下降,其抗老化能力较差。如何进一步提升再生混合料的长期路用性能还需要更多的研究和探索。
引文
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[2]Hong F,Chen D H,Mikhail M.Long-term performance evaluation of recycled asphalt pavement results from Texas:Pavement studies category 5 sections from the longterm pavement performanceprogram[J].Transportation Research Record:Journal of the Transportation Research Board,2010(2180):58-66.
[3]West R,Timm D,Willis R,et al.Phase IV NCAT pavement test track findings[J].National Center for Asphalt Technology,Auburn University,2012.
[4]周岚.高速公路沥青路面使用性能评价及预测研究[D].南京:东南大学,2015.
[5]Witczak M W.Simple performance tests:Summary of recommended methods and database[M].Transportation Research Board,2005.
[6]Molenaar A A A,Scarpas A,Liu X,et al.Semi-circular bending test;simple but useful?[J].Journal of the Association of Asphalt Paving Technologists,2002,71.
[7]葛折圣,黄晓明,许国光.用弯曲应变能方法评价沥青混合料的低温抗裂性能[J].东南大学学报(自然科学版),2002,32(4):653-655.