Effect of porosity on infrared healing of fatigue damage in asphalt

被引：28

作者：

Salih, S. ^{[1
]}

Gomez-Meijide, B. ^{[1
]}

Aboufoul, M. ^{[1
]}

Garcia, A. ^{[1
]}

机构：

[1] Univ Nottingham, Dept Civil Engn, NTEC, Nottingham NG7 2RD, England

来源：

CONSTRUCTION AND BUILDING MATERIALS | 2018年 / 167卷

基金：

英国工程与自然科学研究理事会;

关键词：

Fatigue; Asphalt; Healing; Microstructure; Air voids; LOADING FREQUENCY; INDUCTION; MIXTURES; REJUVENATORS; AGGREGATE; CONCRETE; BEHAVIOR; BITUMEN;

D O I：

10.1016/j.conbuildmat.2018.02.065

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Nowadays most of our roads are made of asphalt mixes, a complex visco-elastoplastic material with self healing properties. The present paper explores the effect of air voids content and their interconnectivity on the capacity of asphalt mixtures to heal fatigue cracks when a thermal infrared treatment is applied. Results showed that the percolation of air voids is required to optimise healing results. In samples with a lower content, the thermal expansion of bitumen and its flow through cracks can exceed the pore network's capacity. As a consequence, the internal pressure can increase enough to produce material damage instead of healing. (C) 2018 Published by Elsevier Ltd.

引用

页码：716 / 725

页数：10

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