[1]沈凡,钟亚聃,向天翔,等.再生剂在再生沥青混合料中的扩散融合行为研究 [J].武汉工程大学学报,2025,47(06):629-633,652.[doi:10.19843/j.cnki.CN42-1779/TQ.202411004]
　SHEN Fan,ZHONG Yadan,XIANG Tianxiang,et al. Diffusion and fusion behavior of rejuvenator in recycled asphalt mixture [J].Journal of Wuhan Institute of Technology,2025,47(06):629-633,652.[doi:10.19843/j.cnki.CN42-1779/TQ.202411004]

点击复制

再生剂在再生沥青混合料中的扩散融合行为研究
(/HTML)

分享到：

《武汉工程大学学报》[ISSN:1674-2869/CN:42-1779/TQ]

卷:

47

期数:

2025年06期

页码:

629-633,652

栏目:

现代大化工

出版日期:

2025-12-31

文章信息/Info

Title:

Diffusion and fusion behavior of rejuvenator in recycled asphalt mixture

文章编号:

1674 - 2869（2025）06 - 0629 - 05

作者:

沈凡¹; 钟亚聃¹; 向天翔¹; 谯理格²

1. 武汉工程大学材料科学与工程学院，湖北 武汉 430205；

2. 中建商品混凝土江西有限公司，江西 南昌 330006

Author(s):

SHEN Fan¹;  ZHONG Yadan¹;  XIANG Tianxiang¹;  QIAO Lige²

1. School of Materials Science and Engineering，Wuhan Institute of Technology，Wuhan 430205，China；

2. China Construction Commercial Concrete Jiangxi Co.，Ltd，Nanchang 330006，China

关键词:

道路工程; 再生沥青混合料; 分层萃取法; 再生剂; 扩散融合

Keywords:

road engineering; recycled asphalt mixture; hierarchical extraction; regenerator; diffusion and fusion

分类号:

U414

DOI:

10.19843/j.cnki.CN42-1779/TQ.202411004

文献标志码:

A

摘要:

为研究拌合工艺对再生剂与新老沥青扩散融合行为的影响，实现回收沥青路面材料（RAP）的有效利用，分别对采用4种工艺[RAP预热+温拌剂（HW工艺）、RAP预热（H工艺）、RAP冷加+温拌剂（CW工艺）、RAP冷加（C工艺）]制备的再生沥青混合料进行分层浸渍，提取出混合料内外层沥青试样，并利用凝胶渗透色谱（GPC）和原子力显微镜（AFM）进行测试分析。GPC归一化分子量曲线及不同区域面积积分分析表明：C工艺试样内外层曲线差异最大（外层小分子含量33.1%，内层大分子含量26.3%），HW工艺试样内外层曲线最接近（外层小分子含量25.7%，内层大分子含量21.3%），H工艺与CW工艺试样介于两者之间。AFM三维形貌显示：C工艺与HW工艺沥青试样较老化沥青呈现更密集的细长平滑小凸起，HW工艺呈现的凸起较C工艺更均匀。再生剂与新老沥青扩散融合过程不均匀，不同工艺下扩散融合效果由强到弱依次为HW、H、CW、C，RAP预热并添加温拌剂（HW工艺）最有利于促进再生剂的有效扩散融合。

Abstract:

To investigate the influence of mixing processes on the diffusion and fusion behavior between rejuvenator and aged/virgin asphalt，thereby promoting effective utilization of reclaimed asphalt pavement（RAP），recycled asphalt mixtures prepared using four processes（RAP preheating+warm-mix additive（HW process），RAP preheating（H process），RAP cold addition+warm-mix additive（CW process），RAP cold addition（C process）） were subjected to layered extraction. Asphalt samples from the inner and outer layers of the mixture were obtained and analyzed using gel permeation chromatography （GPC） and atomic force microscopy（AFM）. Analysis of GPC-normalized molecular weight curve and area integration of different regions revealed that the C process samples exhibited the most significant difference between the inner and outer layer curves（outer layer small-molecule content: 33.1%; inner layer large-molecule content: 26.3%），whereas the HW process samples showed the smallest difference （outer layer small-molecule content: 25.7%; inner layer large-molecule content: 21.3%）. The H process and CW process samples showed intermediate results. AFM three-dimensional topography showed that both the C and HW process asphalt samples displayed denser，elongated，and smooth small bumps compared to the aged asphalt，with the bumps in the HW process samples more uniform than those in the C process samples. The results demonstrated that the fusion and diffusion process between the rejuvenator and the aged/virgin asphalt is not uniform. The effectiveness of diffusion and fusion under the different processes，ranked from strongest to weakest，is as follows：HW，H，CW，C. The process involving RAP preheating combined with warm-mix additive （HW process） is most conducive to promoting effective diffusion and fusion of the rejuvenator.

备注/Memo

备注/Memo:

收稿日期：2024-11-05

基金项目：国家自然科学基金（52178248）；武汉市市政建设集团有限公司科技计划项目（wszky202109）

作者简介：沈 凡，博士，教授。Email：shenf@wit.edu.cn

常用功能