Effect of Ageing on Self-Healing Properties of Asphalt Concrete Containing Calcium Alginate/Attapulgite Composite Capsules

Yu, Xin; Liu, Quantao; Wan, Pei; Song, Jiangkai; Wang, Huan; Zhao, Feiyang; Wang, Yafei; Wu, Jinyi

doi:10.3390/ma15041414

Open AccessArticle

Effect of Ageing on Self-Healing Properties of Asphalt Concrete Containing Calcium Alginate/Attapulgite Composite Capsules

by

Xin Yu

,

Quantao Liu

^*,

Pei Wan

^*,

Jiangkai Song

,

Huan Wang

,

Feiyang Zhao

,

Yafei Wang

and

Jinyi Wu

State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China

^*

Authors to whom correspondence should be addressed.

Materials 2022, 15(4), 1414; https://doi.org/10.3390/ma15041414

Submission received: 17 January 2022 / Revised: 8 February 2022 / Accepted: 11 February 2022 / Published: 14 February 2022

(This article belongs to the Special Issue Innovative Road Materials and Pavement Design—Functional Materials and Intelligent Sensing Pavement)

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Abstract

Calcium alginate capsules within asphalt concrete can gradually release interior asphalt rejuvenator under cyclic loading to repair micro cracks and rejuvenate aged asphalt in-situ. However, asphalt pavement will become aged due to environmental and traffic factors during the service period. In view of this, this paper investigated the effect of ageing on the healing properties of asphalt concrete containing calcium alginate/attapulgite composite capsules under cyclic loading. The capsules were fabricated using the orifice-bath method and the morphological structure, mechanical strength, thermal stability, oil release ratios and healing levels of capsules in fresh, short-term ageing and long-term ageing asphalt concrete were explored. The results indicated that the different ageing treatments would not damage the multi-chamber structure nor decrease the mechanical strength of capsules but would induce the capsules release oil prematurely. The premature oil released from capsules in turn can offset the ageing effect owing to ageing treatment. The short-term ageing and long-term ageing plain asphalt mixtures gained strength recovery ratios of 39.3% and 34.2% after 64,000 cycles of compression loading, while the strength recovery ratios of short-term ageing and long-term ageing asphalt mixtures containing capsules were 63.5% and 54.8%, respectively.

Keywords: asphalt mixture; self-healing; calcium alginate capsules; ageing treatment

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MDPI and ACS Style

Yu, X.; Liu, Q.; Wan, P.; Song, J.; Wang, H.; Zhao, F.; Wang, Y.; Wu, J. Effect of Ageing on Self-Healing Properties of Asphalt Concrete Containing Calcium Alginate/Attapulgite Composite Capsules. Materials 2022, 15, 1414. https://doi.org/10.3390/ma15041414

AMA Style

Yu X, Liu Q, Wan P, Song J, Wang H, Zhao F, Wang Y, Wu J. Effect of Ageing on Self-Healing Properties of Asphalt Concrete Containing Calcium Alginate/Attapulgite Composite Capsules. Materials. 2022; 15(4):1414. https://doi.org/10.3390/ma15041414

Chicago/Turabian Style

Yu, Xin, Quantao Liu, Pei Wan, Jiangkai Song, Huan Wang, Feiyang Zhao, Yafei Wang, and Jinyi Wu. 2022. "Effect of Ageing on Self-Healing Properties of Asphalt Concrete Containing Calcium Alginate/Attapulgite Composite Capsules" Materials 15, no. 4: 1414. https://doi.org/10.3390/ma15041414

APA Style

Yu, X., Liu, Q., Wan, P., Song, J., Wang, H., Zhao, F., Wang, Y., & Wu, J. (2022). Effect of Ageing on Self-Healing Properties of Asphalt Concrete Containing Calcium Alginate/Attapulgite Composite Capsules. Materials, 15(4), 1414. https://doi.org/10.3390/ma15041414

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Effect of Ageing on Self-Healing Properties of Asphalt Concrete Containing Calcium Alginate/Attapulgite Composite Capsules

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