Assessing the bond strength of expansive agent-enhanced repair mortars for ageing concrete structures
As reinforced concrete structures age, they increasingly require extensive maintenance and repair. Due to their limited lifespan, repair materials are often susceptible to early cracking, resulting from environmental influences, deformation, and physical-chemical incompatibilities between the repair...
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| Format: | Article |
| Language: | English |
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EDP Sciences
2025-01-01
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| Series: | MATEC Web of Conferences |
| Online Access: | https://www.matec-conferences.org/articles/matecconf/pdf/2025/03/matecconf_cs2025_09001.pdf |
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| author | Ammar Lina Hannawi Kinda Darquennes Aveline |
| author_facet | Ammar Lina Hannawi Kinda Darquennes Aveline |
| author_sort | Ammar Lina |
| collection | DOAJ |
| description | As reinforced concrete structures age, they increasingly require extensive maintenance and repair. Due to their limited lifespan, repair materials are often susceptible to early cracking, resulting from environmental influences, deformation, and physical-chemical incompatibilities between the repair material and the substrate. In line with sustainable development goals, minimising costly maintenance and repairs is essential. Self-healing mortar presents a promising solution to extend the durability of repaired structures and reduce long-term maintenance needs. The primary objective of this research is to evaluate the self- healing capacity of a cementitious material containing magnesium oxide and calcium sulfo-aluminate-based expansive agents, as well as to assess its mechanical performance under repair conditions. Healing kinetics are monitored through water permeability tests on cylindrical specimens precracked at 28 days. To validate the suitability of the studied mortars for repair applications, their bond strength is measured using pull-off tests under various concrete substrate conditions, including different roughness and saturation levels. Experimental results indicate that incorporating an expansive agent enhances the autonomous healing potential of mortars, with mortars containing calcium sulfo-aluminate-based expansive agents demonstrating superior bond strength and a better healing capacity. |
| format | Article |
| id | doaj-art-ec9fe9bf0ea2496b9e816483fef398ae |
| institution | Kabale University |
| issn | 2261-236X |
| language | English |
| publishDate | 2025-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj-art-ec9fe9bf0ea2496b9e816483fef398ae2025-08-20T03:24:07ZengEDP SciencesMATEC Web of Conferences2261-236X2025-01-014090900110.1051/matecconf/202540909001matecconf_cs2025_09001Assessing the bond strength of expansive agent-enhanced repair mortars for ageing concrete structuresAmmar Lina0Hannawi Kinda1Darquennes AvelineUniv Rennes, INSA Rennes, LGCGM (Laboratoire de Génie Civil et Génie Mécanique) –Univ Rennes, INSA Rennes, LGCGM (Laboratoire de Génie Civil et Génie Mécanique) –As reinforced concrete structures age, they increasingly require extensive maintenance and repair. Due to their limited lifespan, repair materials are often susceptible to early cracking, resulting from environmental influences, deformation, and physical-chemical incompatibilities between the repair material and the substrate. In line with sustainable development goals, minimising costly maintenance and repairs is essential. Self-healing mortar presents a promising solution to extend the durability of repaired structures and reduce long-term maintenance needs. The primary objective of this research is to evaluate the self- healing capacity of a cementitious material containing magnesium oxide and calcium sulfo-aluminate-based expansive agents, as well as to assess its mechanical performance under repair conditions. Healing kinetics are monitored through water permeability tests on cylindrical specimens precracked at 28 days. To validate the suitability of the studied mortars for repair applications, their bond strength is measured using pull-off tests under various concrete substrate conditions, including different roughness and saturation levels. Experimental results indicate that incorporating an expansive agent enhances the autonomous healing potential of mortars, with mortars containing calcium sulfo-aluminate-based expansive agents demonstrating superior bond strength and a better healing capacity.https://www.matec-conferences.org/articles/matecconf/pdf/2025/03/matecconf_cs2025_09001.pdf |
| spellingShingle | Ammar Lina Hannawi Kinda Darquennes Aveline Assessing the bond strength of expansive agent-enhanced repair mortars for ageing concrete structures MATEC Web of Conferences |
| title | Assessing the bond strength of expansive agent-enhanced repair mortars for ageing concrete structures |
| title_full | Assessing the bond strength of expansive agent-enhanced repair mortars for ageing concrete structures |
| title_fullStr | Assessing the bond strength of expansive agent-enhanced repair mortars for ageing concrete structures |
| title_full_unstemmed | Assessing the bond strength of expansive agent-enhanced repair mortars for ageing concrete structures |
| title_short | Assessing the bond strength of expansive agent-enhanced repair mortars for ageing concrete structures |
| title_sort | assessing the bond strength of expansive agent enhanced repair mortars for ageing concrete structures |
| url | https://www.matec-conferences.org/articles/matecconf/pdf/2025/03/matecconf_cs2025_09001.pdf |
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