RAP料的老化性能与再生技术

Aging Performance and Regeneration Technology of RAP Material

考虑到路面沥青在自然条件下同时承受着荷载压力老化、紫外线光老化和温度热老化,在《公路工程沥青及沥青混合料试验规程》中沥青的单因素老化试验方法的基础上,提出了沥青综合模拟老化试验。室内综合模拟老化后的沥青针入度、延度降低,软化点增加。其次,介绍了RAP料的回收方法、级配设计和再生剂功能,最后研究了四种不同的RAP料再生技术的差异。

Considering the pavement asphalt bearing the load pressure aging, ultraviolet ray light aging and temperature heat aging at the same time under the natural condition, this paper proposes the synthesis simulation aging test of asphalt on the basis of the single factor aging testing method of asphalt in Testing Regulations of Asphalt and Bituminous Mixture for Highway Engineering. The asphalt penetration and ductility are reduced, and the softening points are increased after laboratory synthesis simulation aging. This paper introduces the recovery method, grading design and regeneration function of RAP material, and studies the difference of four different RAP material regeneration technologies.