不同RAP分档厂拌热再生沥青混合料性能研究

Study on Performances of Different RAP-graded Hot-recycled Asphalt Mixtures

摘要:

为了更高效地利用废旧沥青混合料，通过将拌和楼原有的两档废旧沥青混合料划分为三档，对不同RAP分档下的厂拌热再生沥青混合料的路用性能进行对比研究，结果表明：经二次筛分分档处理后获得的三档RAP热再生混合料的抗水损害性能、高温抗车辙性能、低温抗开裂性能均有不同程度的提升，加入再生剂后，经过二次筛分处理后的三档RAP热再生沥青混合料中的旧料的再生利用率更高，再生混合料的路用性能提升更为显著，能够有效满足沥青路面的运营使用需求。

Abstract:

In order to utilize the waste asphalt mixture more effectively, the original two grades of waste asphalt mixture in the mixing building are divided into three grades to compare and study the pavement performances of the plant-mixed hot-recycled asphalt mixture under different RAP grades. The results show that the water damage resistance, high-temperature rutting resistance and low-temperature cracking resistance of the RAP hot-recycled mixtures at the three grades obtained after the secondary screening and grading treatment are improved to varying degrees. After adding the reclaiming agent, the recycling rate of the old material in the three grades of RAP hot-recycled asphalt mixture is higher, and the pavement performances of the recycled mixture is improved more significantly after the secondary screening treatment, which can effectively meet the operational needs of asphalt pavement.