生物粘合剂在废旧沥青材料再生应用中的研究进展∗

摘要

为充分利用道路行业以及建筑行业每年产生的大量废旧沥青材料，改善传统路面再生技术对旧料利用率低且对环境造成的不良影响，介绍了一种将生物粘合剂用于废旧沥青材料再生的方法。重点阐述了由猪粪热解得到的生物粘合剂对回收的废旧沥青材料和回收沥青瓦的改性再生方法，以及再生后材料的路用性能，指出存在的问题和未来进一步研究建议。现有研究表明，生物粘合剂加入到废旧沥青材料中能有效降低其粘度，改善其和易性，显著提高废旧沥青材料含量大的混合料的低温抗裂性和抵抗疲劳开裂性能，且其水稳定性和抗车辙性能均能满足规范要求，相比传统沥青路面旧料的再生利用方法具备优良的环境、经济和实施效益。将生物粘合剂用于废旧沥青材料再生行业具有广阔的发展前景，可以为在我国铺面工程中的研究应用提供参考。%In order to make full use of a large number of waste asphalt material generated by pavement and con-struction industry,and to surmount low waste material utilization rate and adverse effects on environment of traditio-nal recycling technology,a method that uses the bio-binder for waste asphalt material recycling is introduced.The re-cycling route of reclaimed asphalt pavement and recycled asphalt shingles by bio-binders obtained from swine manure and performance of the recyled materials are expounded.In addition,the problems exiting and further research advises are proposed.Curent researches show that after the bio-binder is mixed into the waste asphalt material,the viscosity can be reduced effectively,the workability and low temperature crack resistance and fatigue cracking resistance of the mixture are improved,especially when containing a lot of waste asphalt material.Both the moisture susceptibility and rutting susceptibility meet the specifications.Compared with the traditional recycling technology,this method is more environmental friendly,economic and easy to implement.The use of bio-binders is of prospective importance to as-phalt recycling process,and can provide reference for bio-recycling study and application in pavement engineering in China.