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布敦岩沥青改性沥青的物理性质与储存稳定性

Physical Properties and Storage Stability of Buton Rock Asphalt Modified Asphalt.

作者信息

Su Yue, Hu Xiaodi, Wan Jiuming, Wu Shaopeng, Zhang Yinglong, Huang Xing, Liu Zhangjun

机构信息

School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430205, China.

State Key Laboratory of Silicate Materials for Architecture, Wuhan University of Technology, Wuhan 430070, China.

出版信息

Materials (Basel). 2022 May 18;15(10):3592. doi: 10.3390/ma15103592.

DOI:10.3390/ma15103592
PMID:35629619
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9147411/
Abstract

Buton Rock Asphalt (BRA) refers to the natural rock asphalt natively produced on the Buton island of Indonesia. It is often used as a modifier to enhance the performance of asphaltpavement. However, the segregation of BRA in BRA-Modified Asphalt (BRA-MA) has restricted its application. This study aims to investigate how the particle size and content of BRA affect the physical properties and storage stability of BRA-MA. Penetration, softening point, viscosity, and viscosity-temperature susceptibility (VTS) were analyzed. The evaluation method of storage stability was discussed and determined. The segregation of BRA in BRA-MA of static storage and transportation process were simulated and tested. The results suggest that the softening point and viscosity were positively correlated to BRA content and inversely determined by particle size. Penetration, VTS, and ductility were reduced due to the decline in particle size and increment of BRA content. The index of segregation value based on viscosity difference showed better statistical and quantitative significances than the softening-point difference in evaluating the storage stability. The particle size and content of BRA are positively correlated to the segregation of BRA-MA. Both the storage temperature and time were positively correlated to the segregation of BRA-MA. We prove that the relationship between specific surface area and segregation are power functional. BRA-MA with BRA whose 50% particle sizes are lower than 13.6 μm showed low segregation in transportation.

摘要

布敦岩沥青（BRA）是指在印度尼西亚布敦岛上天然产出的岩石沥青。它常被用作改性剂以提高沥青路面的性能。然而，BRA在BRA改性沥青（BRA-MA）中的离析现象限制了其应用。本研究旨在探究BRA的粒径和含量如何影响BRA-MA的物理性能和储存稳定性。分析了针入度、软化点、粘度和粘度-温度敏感性（VTS）。讨论并确定了储存稳定性的评价方法。模拟并测试了BRA在BRA-MA静态储存和运输过程中的离析情况。结果表明，软化点和粘度与BRA含量呈正相关，与粒径呈反比。由于粒径减小和BRA含量增加，针入度、VTS和延度降低。在评价储存稳定性方面，基于粘度差的离析值指标比软化点差具有更好的统计和定量意义。BRA的粒径和含量与BRA-MA的离析呈正相关。储存温度和时间均与BRA-MA的离析呈正相关。我们证明了比表面积与离析之间的关系为幂函数关系。50%粒径低于13.6μm的BRA的BRA-MA在运输过程中离析程度较低。

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