厂拌热再生沥青混合料的性能研究
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摘要
为了有效改善废旧沥青混合料(RAP)在厂拌热再生中的应用,通过向旧沥青中掺入一定比例的再生剂,并通过三大指标进行对沥青性能评价;根据配合比设计方法,对厂拌热再生沥青混合料进行新料与旧料的配合比设计,试验中废旧沥青混合料的掺量为40%,对再生沥青混合料进行了高温车辙试验、低温抗裂试验、水稳定性试验以此研究其相关性能。试验结果表明:当废旧沥青混合料中掺入8%的再生剂后,旧沥青性能得到了有效的恢复,再生混合料的高温性能得到了大幅提升,低温性能及水稳定性能都有不同程度的降低。
In order to effectively improve the application of waste asphalt mixture(RAP) in plant heat regeneration, a certain proportion of regenerant is blended into the old asphalt, and the performance of asphalt is evaluated through three major indicators; The mixing ratio of new materials and old materials is designed for the plant mixed heat recycled asphalt mixture. The amount of waste asphalt mixture in the experiment is 40%. The high temperature rutting experiment, low temperature crack resistance test and water are applied to the recycledasphalt mixture. The stability experiment was used to study its related properties. The experimental results show that when the waste asphalt mixture is mixed with 8% regenerant, the performance of the old asphalt is effectively restored, the high temperature performance of the recycled mixture is greatly improved, and the low temperature performance and water stability have different degrees reduced.
In order to effectively improve the application of waste asphalt mixture(RAP) in plant heat regeneration, a certain proportion of regenerant is blended into the old asphalt, and the performance of asphalt is evaluated through three major indicators; The mixing ratio of new materials and old materials is designed for the plant mixed heat recycled asphalt mixture. The amount of waste asphalt mixture in the experiment is 40%. The high temperature rutting experiment, low temperature crack resistance test and water are applied to the recycledasphalt mixture. The stability experiment was used to study its related properties. The experimental results show that when the waste asphalt mixture is mixed with 8% regenerant, the performance of the old asphalt is effectively restored, the high temperature performance of the recycled mixture is greatly improved, and the low temperature performance and water stability have different degrees reduced.
引文
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[4]JTGF40-2004,公路沥青路面施工技术规范[S].
[5]边睿.热再生沥青混合料抗变形性能试验研究[J].山西交通科技,2017(5):1-3.
[2]许书萍.废旧沥青材料再利用的可行性分析[J].华东公路,2003(5):73-74.
[3]谢鹏.旧沥青混凝土厂拌热再生技术应用浅探[A].武汉理工大学.全国城市公路学会第二十三次学术年会论文集[C].武汉理工大学:交通科技杂志社,2014:3.
[4]JTGF40-2004,公路沥青路面施工技术规范[S].
[5]边睿.热再生沥青混合料抗变形性能试验研究[J].山西交通科技,2017(5):1-3.