Effects of healing start time and duration on conventional and high-performance concretes incorporating SAP, crystalline admixture, and sepiolite: A comparative study
This research investigates the self-healing capability of conventional and high-performance concrete containing either a superabsorbent polymer (SAP), a crystalline admixture (CA), or water-encapsulated in sepiolite by quantifying the recovery of water tightness through the water permeability test a...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-07-01
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| Series: | Case Studies in Construction Materials |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214509523010161 |
| _version_ | 1797366626434154496 |
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| author | Hesam Doostkami Sidiclei Formagini Pedro Serna Marta Roig-Flores |
| author_facet | Hesam Doostkami Sidiclei Formagini Pedro Serna Marta Roig-Flores |
| author_sort | Hesam Doostkami |
| collection | DOAJ |
| description | This research investigates the self-healing capability of conventional and high-performance concrete containing either a superabsorbent polymer (SAP), a crystalline admixture (CA), or water-encapsulated in sepiolite by quantifying the recovery of water tightness through the water permeability test and chloride permeability via cracks and matrix penetration on healed specimens. Specimens were pre-cracked to a crack width range of 50–450 µm at 28 days. Specimens were healed under water in four time combinations: healing starting at the concrete age of 28 days or 56 days and a healing duration of 28 or 56 days. Additionally, a healing condition of presaturation during 1 day of water immersion and storage in a humidity chamber for 27 days was studied. The results show that delayed healing reduced the self-healing efficiency, and extending the duration to 56 days enhanced healing, especially for narrow cracks (≈100 µm), and reduced chloride permeability. Specimens with SAP showed superior early-stage healing, but low delayed healing. Sepiolite enhanced healing for delayed cracks with variable effectiveness. CA improved healing for both early and delayed healing, exhibiting low chloride penetration in healed specimens. |
| first_indexed | 2024-03-08T17:07:25Z |
| format | Article |
| id | doaj.art-f1da3600db034e0ca814bf421c917522 |
| institution | Directory Open Access Journal |
| issn | 2214-5095 |
| language | English |
| last_indexed | 2024-03-08T17:07:25Z |
| publishDate | 2024-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Construction Materials |
| spelling | doaj.art-f1da3600db034e0ca814bf421c9175222024-01-04T04:39:31ZengElsevierCase Studies in Construction Materials2214-50952024-07-0120e02835Effects of healing start time and duration on conventional and high-performance concretes incorporating SAP, crystalline admixture, and sepiolite: A comparative studyHesam Doostkami0Sidiclei Formagini1Pedro Serna2Marta Roig-Flores3Universitat Politècnica de València, Instituto de Ciencia y Tecnología del Hormigón, Valencia, Spain; Correspondence to: ICITECH - Institute of Concrete Science and Technology, Edificio 4N, Universitat Politècnica de València, Camino de Vera, s/n 46022 Valencia, Spain.Universidade Federal de Mato Grosso do Sul, FAENG - Faculdade de Engenharias, Arquitetura e Urbanismo e geografia, Campo Grande, BrasilUniversitat Politècnica de València, Instituto de Ciencia y Tecnología del Hormigón, Valencia, SpainUniversitat Jaume I, Department of Mechanic Engineering and Construction, Castelló de la Plana, SpainThis research investigates the self-healing capability of conventional and high-performance concrete containing either a superabsorbent polymer (SAP), a crystalline admixture (CA), or water-encapsulated in sepiolite by quantifying the recovery of water tightness through the water permeability test and chloride permeability via cracks and matrix penetration on healed specimens. Specimens were pre-cracked to a crack width range of 50–450 µm at 28 days. Specimens were healed under water in four time combinations: healing starting at the concrete age of 28 days or 56 days and a healing duration of 28 or 56 days. Additionally, a healing condition of presaturation during 1 day of water immersion and storage in a humidity chamber for 27 days was studied. The results show that delayed healing reduced the self-healing efficiency, and extending the duration to 56 days enhanced healing, especially for narrow cracks (≈100 µm), and reduced chloride permeability. Specimens with SAP showed superior early-stage healing, but low delayed healing. Sepiolite enhanced healing for delayed cracks with variable effectiveness. CA improved healing for both early and delayed healing, exhibiting low chloride penetration in healed specimens.http://www.sciencedirect.com/science/article/pii/S2214509523010161Self-healingWater permeabilityChloride penetrationHigh-performance concreteCrystalline admixtureSuperabsorbent polymer |
| spellingShingle | Hesam Doostkami Sidiclei Formagini Pedro Serna Marta Roig-Flores Effects of healing start time and duration on conventional and high-performance concretes incorporating SAP, crystalline admixture, and sepiolite: A comparative study Case Studies in Construction Materials Self-healing Water permeability Chloride penetration High-performance concrete Crystalline admixture Superabsorbent polymer |
| title | Effects of healing start time and duration on conventional and high-performance concretes incorporating SAP, crystalline admixture, and sepiolite: A comparative study |
| title_full | Effects of healing start time and duration on conventional and high-performance concretes incorporating SAP, crystalline admixture, and sepiolite: A comparative study |
| title_fullStr | Effects of healing start time and duration on conventional and high-performance concretes incorporating SAP, crystalline admixture, and sepiolite: A comparative study |
| title_full_unstemmed | Effects of healing start time and duration on conventional and high-performance concretes incorporating SAP, crystalline admixture, and sepiolite: A comparative study |
| title_short | Effects of healing start time and duration on conventional and high-performance concretes incorporating SAP, crystalline admixture, and sepiolite: A comparative study |
| title_sort | effects of healing start time and duration on conventional and high performance concretes incorporating sap crystalline admixture and sepiolite a comparative study |
| topic | Self-healing Water permeability Chloride penetration High-performance concrete Crystalline admixture Superabsorbent polymer |
| url | http://www.sciencedirect.com/science/article/pii/S2214509523010161 |
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