Xie Jiawen, Huang Wenke, Hu Bei, Xiao Zhicheng, Hassan Hafiz Muhammad Zahid, Wu Kuanghuai
School of Civil Engineering, Guangzhou University, Guangzhou 510006, China.
Materials (Basel). 2021 Sep 17;14(18):5379. doi: 10.3390/ma14185379.
Warm-mixed reclaimed asphalt pavement (RAP) technology has been widely studied worldwide as a recycled environmental method to reuse waste materials. However, the aggregate skeleton structure of the warm-mixed reclaimed asphalt mixture is not stable because of the existence of the recycled materials. Warm-mixed recycled semi-flexible pavement material can solve the defects of the above materials. In this study, five different types of open-graded asphalt mixtures containing different contents of RAP were designed, and relevant laboratory tests were conducted to assess the road performance of the warm-mixed recycled semi-flexible pavement material. The test results indicated that the road performance of warm-mixed reclaimed semi-flexible pavement materials has good resistance to rut deformation ability. Furthermore, the materials also had good water stability and fatigue performance. The grey correlation analysis shows that the asphalt binder content has the most significant correlation with the high-temperature stability, and the correlation between RAP content and the fatigue performance was the greatest. Furthermore, the curing age has the most remarkable with the low-temperature crack resistance of the warm-mixed reclaimed semi-flexible material.
温拌再生沥青路面（RAP）技术作为一种回收利用废料的环保型再生方法，已在全球范围内得到广泛研究。然而，由于再生材料的存在，温拌再生沥青混合料的集料骨架结构不稳定。温拌再生半柔性路面材料可以解决上述材料的缺陷。在本研究中，设计了五种不同类型的、含有不同RAP含量的开级配沥青混合料，并进行了相关室内试验，以评估温拌再生半柔性路面材料的路用性能。试验结果表明，温拌再生半柔性路面材料的路用性能具有良好的抗车辙变形能力。此外，该材料还具有良好的水稳定性和疲劳性能。灰色关联分析表明，沥青结合料含量与高温稳定性的相关性最为显著，RAP含量与疲劳性能的相关性最大。此外，养护龄期对温拌再生半柔性材料的低温抗裂性影响最为显著。
