Ageing and temperature effect on the fatigue performance of bituminous mixtures

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2017-06-27 DOI:10.3989/MC.2017.04216

T. López-Montero, R. Miró

引用次数: 12

Abstract

The ageing of asphalt mixes, together with their exposure to low temperatures, causes a progressive increase of cracking. In this paper, the effect of ageing and temperature on the fatigue of asphalt concretes made with two types of binders, conventional (50/70) and polymer modified bitumen (PMB), is studied. For this purpose, specimens previously subjected to an accelerated laboratory ageing process were tested by a strain sweep test at different temperatures (-5oC, 5oC and 20°C). Results were compared with the obtained from the unaged specimens showing the relative importance of ageing, temperature and type of bitumen on the parameters that determine the fatigue life of the mixture. The mixtures behaviour becomes more brittle with ageing and the decrease of temperature. However, ageing hardly has an effect on fatigue at lower temperatures. In general, mixtures made with polymer modified bitumen have a better fatigue performance to ageing and temperature.

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老化和温度对沥青混合料疲劳性能的影响

沥青混合料的老化，加上它们暴露在低温下，会导致裂缝的逐渐增加。本文研究了老化和温度对传统（50/70）和聚合物改性沥青（PMB）两种粘结剂制备的沥青混凝土疲劳性能的影响。为此，在不同温度（-5℃、5℃和20°C）下，通过应变扫描试验对先前经过加速实验室老化过程的试样进行测试。将结果与未老化试样的结果进行比较，表明老化、温度和沥青类型对决定混合物疲劳寿命的参数的相对重要性。随着老化和温度的降低，混合物的行为变得更加脆性。然而，在较低的温度下，老化几乎不会对疲劳产生影响。通常，由聚合物改性沥青制成的混合物对老化和温度具有更好的疲劳性能。

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.