高温重复荷载作用下复合纤维沥青混合料细微观结构分析

doi:10.11896/j.issn.1005-023X.2018.06.025

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Abstract In order to study the influence of the composite fiber on the asphalt mixture fine microstructure under high tempe-rature and repeated loading, the accelerated loading test was carried out to investigate the rutting depth of asphalt mixture with additional three kinds of composite fiber and without fiber. CT scan test was utilized to examine the variation of average void volume and coarse aggregate inclination before and after accelerated loading test. The results implied that under high temperature repeated loa-ding, asphalt mixture adding three kinds of composite fiber can improve the anti-rutting ability of asphalt mixture, the asphalt mixture with composite fiber Ⅲ can reduce rutting depth of 61%. After adding three kinds of composite fiber, the mixture average void volume was decreased and coarse aggregate level angle was increased. Under high temperature and repeated loading, three kinds of composite fiber can significantly retard the increase of average pore volume of asphalt mixture, which increased less than 13%, and simultaneously slower the decrease of coarse aggregate level angle, which decreased less than 6.6 degrees. There is a good linear correlation of the rutting depth of asphalt mixture with the average volume of voids and the inclination of coarse aggregate.

Key words： road engineering composite fiber accelerated loading test CT test average void volume coarse aggregate inclination

Published: 25 March 2018 Online: 2018-03-25

CLC number:

TB332

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	Articles by authors
	ZHANG Hang
	HAO Peiwen
	LING Tianqing
	WANG Xuewu
	HE Liang

Cite this article:

ZHANG Hang,HAO Peiwen,LING Tianqing, et al. Analysis of Microscopic Structure of Composite Fiber Asphalt Mixture Subjected to Repeated Loading Under High Temperature[J]. Materials Reports, 2018, 32(6): 987-994.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.06.025 OR https://www.mater-rep.com/EN/Y2018/V32/I6/987

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