Review of Lab-Accelerated Aging Techniques of Asphalt Mixes

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2024-06-01 DOI:10.31026/j.eng.2024.06.01

H. R. Hmoud, Nabeel N. Salman, Mansura Dmytro

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引用次数: 0

Abstract

Bitumen aging contributes to main pavement distress due to the changes in rheological, chemical, and physical characteristics of bitumen. Mainly, aging process can be divided into two categories, the first category namely short-term aging takes place during the heating up of bitumen and aggregate, mixing, transportation, laying down, and compaction. While the second category of aging takes place during the service life of pavement which is denoted as long-term aging. Consequently, researchers’ focus is to simulate bitumen aging in the lab by developing lab-accelerated methods to simulate the process of bitumen aging and studying the rate of change before and after aging. This article reviews these methods and compares the extent of the impact on lab-aged bitumen with old bitumen. The main outcome is, that the duration of exposure to high temperatures, which is the dominant method to accelerate aging process, resulted in inadequate changes in the structure of the bitumen molecule, hence, making it different from old bitumen. For that reason, using oxidants such as hydrogen peroxide showed more reliable results but requires more attention by researchers to achieve a standardized aging process of bitumen.

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沥青混合料实验室加速老化技术综述

由于沥青的流变、化学和物理特性发生变化，沥青老化是造成路面损坏的主要原因。老化过程主要可分为两类，第一类是短期老化，发生在沥青和集料的加热、搅拌、运输、铺设和压实过程中。第二类老化发生在路面的使用寿命期间，称为长期老化。因此，研究人员的重点是在实验室中模拟沥青老化，通过开发实验室加速方法来模拟沥青老化过程，并研究老化前后的变化率。本文回顾了这些方法，并比较了实验室老化沥青与旧沥青的影响程度。主要结果是，暴露在高温下的时间--这是加速老化过程的主要方法--导致沥青分子结构发生不充分的变化，从而使其不同于旧沥青。因此，使用过氧化氢等氧化剂会产生更可靠的结果，但需要研究人员给予更多关注，以实现沥青老化过程的标准化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.