期刊论文

Diffusion characteristics of aged and virgin asphalt in reclaimed asphalt

中文

长安大学学报(自然科学版)

1671-8879

2018

38

5

18-24

10.3969/j.issn.1671-8879.2018.05.003

51878075:国家自然科学基金 AC16380111:广西壮族自治区科技计划 2013-100-28:广西壮族自治区交通科技项目

本校为第一机构

为掌握再生沥青中新旧沥青扩散特性,以提高再生沥青混合料性能和旧沥青的再生程度,采用老化沥青和新沥青制备双层沥青试样,保温使新旧沥青扩散,在此基础上,建立基于针入度和动态剪切流变（DSR）试验的新旧沥青扩散程度评价方法和指标,进而研究高温和中温条件下扫描保温时间、保温温度、老化沥青类型及老化程度对新旧沥青扩散程度影响,设计正交试验,并使用极差分析和方差分析方法研究各因素影响程度。结果表明:高温条件下新旧沥青扩散程度随保温时间的增加先增加后不变,随老化程度的增加基质沥青扩散程度逐渐增加,SBS改性沥青则基本不变,且老化程度较低时SBS改性沥青扩散程度优于基质沥青,但老化...

To evaluate the diffusion characteristics of new and old asphalt in recycled asphalt, and to improve the performance of recycled asphalt mixture, two-layer asphalt samples were prepared using aged asphalt and virgin asphalt, and thermal insulation was used for the diffusion of virgin asphalt and old asphalt. Based on this, an evaluation method and index for the diffusion degree of virgin asphalt and old asphalts based on penetration and dynamic shear rheology (DSR) tests were established. Next, the influence of scanning insulation time, insulat...