回收沥青瓦在沥青路面再生应用中的研究进展-中国材料进展

文章信息/Info

Title:: Advances on the Application of Recycled Asphalt Shingles (RAS) in Asphalt Pavement Recycling

Author(s):: MA Feng1; XING Haipeng1; LU Xianlin2; 1.School of Highway, Chang’an University, Xi’an 710064, China 2.School of Materials Science and Engineering, Chang’an University, Xi’an 710064, China

Keywords:: road engineering; RAS; recycling; asphalt mixture; pavement performance

摘要:: 为了将建筑行业所产生的大量废旧沥青瓦材料再生应用于道路建设中，促进循环利用，阐述了利用回收沥青瓦再生沥青混合料的可行性及相应再生方法，综述了回收沥青瓦改性沥青胶结料的粘度、抗车辙和低温抗开裂等性能以及回收沥青瓦再生沥青混合料的路用性能，指出未来进一步的研究建议。现有研究表明，沥青瓦改性沥青胶结料表现出更好的抗车辙性和低温性能，且低沥青瓦含量对其低温抗裂性能并未有明显影响，沥青瓦改性后因胶结料粘度提高而出现的硬化问题可通过引入生物改性技术来消除。回收沥青瓦材料加入沥青混合料中能有效降低脆化温度，提高混合料的抗车辙性能、抗疲劳开裂性及水稳定性。采用发泡工艺和添加剂可将回收沥青瓦材料再生技术与温拌技术相结合，从而表现出良好的环境和经济效益，为我国环保型路面研究提供了参考价值

Abstract:: In order to reuse a large number of waste recycled asphalt shingles (RAS) material generated by construction industry, and promote the recycling of waste RAS, feasibility and recycling method about application RAS in recycling asphalt mixture are expounded. The viscosity, rutting resistance, and low temperature cracking resistance of RAS modified binder are reviewed. Furthermore, pavement performance of reclaimed asphalt mixture by RAS, and environmental as well as economic benefits are also reviewed. In addition, the existing problems and further research advice are proposed in this paper. Existing researches show that RAS modified binder exists better rutting resistance and low temperature performance, low temperature cracking performance is no evidently deteriorated at low RAS content. Moreover, the increasing viscosity and stiffening problem caused by RAS can be eliminated by introducing biobinder. After RAS is mixed into asphalt mixture, the stiffness, rutting resistance, fatigue cracking resistance and moisture susceptibility are improved effectively. Through adopting foaming technology and additives, the workability of warm mix asphalt mixture recycled by RAS can be improved. The integration of RAS recycling technology with warm mix asphalt (WMA) is more environment friendly and economic, and can provide practical significance for environmental pavement engineering researches.