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Optimised biopolymer-based capsules for enhancing the mechanical and self-healing properties of asphalt mixtures

Jose Norambuena-Contreras Orcid Logo, Jose L. Concha, Gonzalo Valdes-Vidal, Clare Wood Orcid Logo

Materials and Structures, Volume: 57, Issue: 10, Start page: 236

Swansea University Authors: Jose Norambuena-Contreras Orcid Logo, Clare Wood Orcid Logo

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DOI (Published version): 10.1617/s11527-024-02508-6

Abstract

The growing need to enhance our road infrastructure has driven the development of several innovative techniques in recent years. Among these advancements, encapsulated rejuvenator solutions for extrinsic self-healing asphalt have emerged as a significant topic of interest. This paper evaluates the e...

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Published in: Materials and Structures
ISSN: 1359-5997 1871-6873
Published: Springer Nature 2024
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URI: https://cronfa.swan.ac.uk/Record/cronfa68167
first_indexed 2024-11-05T10:49:43Z
last_indexed 2025-01-09T20:32:49Z
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spelling 2024-12-16T14:19:41.2801837 v2 68167 2024-11-05 Optimised biopolymer-based capsules for enhancing the mechanical and self-healing properties of asphalt mixtures 73c6854ebb10465fbf7faab297135641 0000-0001-8327-2236 Jose Norambuena-Contreras Jose Norambuena-Contreras true false 97bede20cc14db118af8abfbb687e895 0000-0003-0001-0121 Clare Wood Clare Wood true false 2024-11-05 ACEM The growing need to enhance our road infrastructure has driven the development of several innovative techniques in recent years. Among these advancements, encapsulated rejuvenator solutions for extrinsic self-healing asphalt have emerged as a significant topic of interest. This paper evaluates the effect of optimised capsules containing vegetal oil as a biorejuvenator on the physical, mechanical, and self-healing properties of dense asphalt mixtures. In this study, previously optimised polynuclear alginate-based capsules were synthesised using vibrating jet technology with 5% wt. calcium chloride and a biopolymer-to oil mass ratio 1:7. Optimised capsules were incorporated into the asphalt mixture at concentrations of 0.125% wt., 0.25% wt., and 0.5% wt. Their spatial distribution within the asphalt mixtures was evaluated using an alternative method to CT scans, which utilised machine learning-based image analysis of the core asphalt samples. The main findings of this research are as follows: (1) a uniform distribution of capsules was achieved throughout the asphalt mixture, although clustering was observed at higher concentrations. (2) The capsules successfully survived the asphalt manufacturing process, and mechanical tests highlighted the adhesive properties of the alginate encapsulation material. (3) Asphalt samples with 0.125% wt. capsules exhibited mechanical performance comparable to samples without capsules; however, this content did not significantly enhance their self-healing properties. In contrast, self-healing capabilities were significantly enhanced with a capsule content greater than or equal to 0.25% wt.; however, this enhancement slightly affected some physical–mechanical properties of the dense asphalt mixture. Journal Article Materials and Structures 57 10 236 Springer Nature 1359-5997 1871-6873 Vegetal oil, Alginate Capsules, Mechanical properties, Asphalt self-healing 1 12 2024 2024-12-01 10.1617/s11527-024-02508-6 COLLEGE NANME Aerospace, Civil, Electrical, and Mechanical Engineering COLLEGE CODE ACEM Swansea University SU Library paid the OA fee (TA Institutional Deal) This research was funded by the National Research and Development Agency (ANID) from Chile, through the Research Project FONDECYT Regular 2019 No.1190027. 2024-12-16T14:19:41.2801837 2024-11-05T10:35:07.6520353 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering Jose Norambuena-Contreras 0000-0001-8327-2236 1 Jose L. Concha 2 Gonzalo Valdes-Vidal 3 Clare Wood 0000-0003-0001-0121 4
title Optimised biopolymer-based capsules for enhancing the mechanical and self-healing properties of asphalt mixtures
spellingShingle Optimised biopolymer-based capsules for enhancing the mechanical and self-healing properties of asphalt mixtures
Jose Norambuena-Contreras
Clare Wood
title_short Optimised biopolymer-based capsules for enhancing the mechanical and self-healing properties of asphalt mixtures
title_full Optimised biopolymer-based capsules for enhancing the mechanical and self-healing properties of asphalt mixtures
title_fullStr Optimised biopolymer-based capsules for enhancing the mechanical and self-healing properties of asphalt mixtures
title_full_unstemmed Optimised biopolymer-based capsules for enhancing the mechanical and self-healing properties of asphalt mixtures
title_sort Optimised biopolymer-based capsules for enhancing the mechanical and self-healing properties of asphalt mixtures
author_id_str_mv 73c6854ebb10465fbf7faab297135641
97bede20cc14db118af8abfbb687e895
author_id_fullname_str_mv 73c6854ebb10465fbf7faab297135641_***_Jose Norambuena-Contreras
97bede20cc14db118af8abfbb687e895_***_Clare Wood
author Jose Norambuena-Contreras
Clare Wood
author2 Jose Norambuena-Contreras
Jose L. Concha
Gonzalo Valdes-Vidal
Clare Wood
format Journal article
container_title Materials and Structures
container_volume 57
container_issue 10
container_start_page 236
publishDate 2024
institution Swansea University
issn 1359-5997
1871-6873
doi_str_mv 10.1617/s11527-024-02508-6
publisher Springer Nature
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering
document_store_str 0
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description The growing need to enhance our road infrastructure has driven the development of several innovative techniques in recent years. Among these advancements, encapsulated rejuvenator solutions for extrinsic self-healing asphalt have emerged as a significant topic of interest. This paper evaluates the effect of optimised capsules containing vegetal oil as a biorejuvenator on the physical, mechanical, and self-healing properties of dense asphalt mixtures. In this study, previously optimised polynuclear alginate-based capsules were synthesised using vibrating jet technology with 5% wt. calcium chloride and a biopolymer-to oil mass ratio 1:7. Optimised capsules were incorporated into the asphalt mixture at concentrations of 0.125% wt., 0.25% wt., and 0.5% wt. Their spatial distribution within the asphalt mixtures was evaluated using an alternative method to CT scans, which utilised machine learning-based image analysis of the core asphalt samples. The main findings of this research are as follows: (1) a uniform distribution of capsules was achieved throughout the asphalt mixture, although clustering was observed at higher concentrations. (2) The capsules successfully survived the asphalt manufacturing process, and mechanical tests highlighted the adhesive properties of the alginate encapsulation material. (3) Asphalt samples with 0.125% wt. capsules exhibited mechanical performance comparable to samples without capsules; however, this content did not significantly enhance their self-healing properties. In contrast, self-healing capabilities were significantly enhanced with a capsule content greater than or equal to 0.25% wt.; however, this enhancement slightly affected some physical–mechanical properties of the dense asphalt mixture.
published_date 2024-12-01T20:35:47Z
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