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
收藏
页码：716 / 725
页数：10
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