A self-healing approach to cement-based materials with crystalline admixtures in normal and accelerated environmental conditions
Cracks in cement-based materials can be a source of significant problems in civil works, especially those exposed to the action of harmful agents and moisture. Its occurrence may be associated with various physical, chemical, or mechanical factors. Self-healing phenomenon can promote cracks repair,...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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EDP Sciences
2023-01-01
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| Series: | MATEC Web of Conferences |
| Online Access: | https://www.matec-conferences.org/articles/matecconf/pdf/2023/05/matecconf_smartincs2023_02023.pdf |
| _version_ | 1797835227779825664 |
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| author | Tamimi Yasmin da Silva Deividi Pfeuffer Bruno Masuero Angela Dal Molin Denise |
| author_facet | Tamimi Yasmin da Silva Deividi Pfeuffer Bruno Masuero Angela Dal Molin Denise |
| author_sort | Tamimi Yasmin |
| collection | DOAJ |
| description | Cracks in cement-based materials can be a source of significant problems in civil works, especially those exposed to the action of harmful agents and moisture. Its occurrence may be associated with various physical, chemical, or mechanical factors. Self-healing phenomenon can promote cracks repair, contributing to a useful life increase through the sealing by cracking closure. This work aimed to evaluate the self-healing phenomenon in cementitious matrices with different crystalline admixtures. Mortars were produced using high initial strength cement, quartz sand, three types of crystalline additives, and 0.4 as w/c ratio. Compressive strength tests were performed at 3 days (crack opening age), 28 days, and 45 days. The environmental conditions were wet/dry cycles in controlled and accelerated climate chambers. Ultrasonic pulse and optical microscopy with image editing techniques were used to evaluate the self-healing phenomenon. The results indicate that the samples in accelerated chamber (CAR) presented the highest mechanical strength at 45 days, and the most significant crack closure to samples with Z crystalline admixture. The ultrasonic wave propagation speed analysis showed that crystalline admixtures-based samples (X, Y and Z) had the highest matrix densification. Additionally, special attention should be given to the samples preparing steps and images editing to identify the healed area for the techniques being used. |
| first_indexed | 2024-04-09T14:50:46Z |
| format | Article |
| id | doaj.art-3fbbb4f4aaaa43eb972b4a026b1f89e2 |
| institution | Directory Open Access Journal |
| issn | 2261-236X |
| language | English |
| last_indexed | 2024-04-09T14:50:46Z |
| publishDate | 2023-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | MATEC Web of Conferences |
| spelling | doaj.art-3fbbb4f4aaaa43eb972b4a026b1f89e22023-05-02T09:34:12ZengEDP SciencesMATEC Web of Conferences2261-236X2023-01-013780202310.1051/matecconf/202337802023matecconf_smartincs2023_02023A self-healing approach to cement-based materials with crystalline admixtures in normal and accelerated environmental conditionsTamimi Yasmin0da Silva Deividi1Pfeuffer Bruno2Masuero Angela3Dal Molin Denise4Núcleo Orientado à Inovação na Edificação (NORIE), Federal University of Rio Grande do Sul (UFRGS)Núcleo Orientado à Inovação na Edificação (NORIE), Federal University of Rio Grande do Sul (UFRGS)Núcleo Orientado à Inovação na Edificação (NORIE), Federal University of Rio Grande do Sul (UFRGS)Núcleo Orientado à Inovação na Edificação (NORIE), Federal University of Rio Grande do Sul (UFRGS)Núcleo Orientado à Inovação na Edificação (NORIE), Federal University of Rio Grande do Sul (UFRGS)Cracks in cement-based materials can be a source of significant problems in civil works, especially those exposed to the action of harmful agents and moisture. Its occurrence may be associated with various physical, chemical, or mechanical factors. Self-healing phenomenon can promote cracks repair, contributing to a useful life increase through the sealing by cracking closure. This work aimed to evaluate the self-healing phenomenon in cementitious matrices with different crystalline admixtures. Mortars were produced using high initial strength cement, quartz sand, three types of crystalline additives, and 0.4 as w/c ratio. Compressive strength tests were performed at 3 days (crack opening age), 28 days, and 45 days. The environmental conditions were wet/dry cycles in controlled and accelerated climate chambers. Ultrasonic pulse and optical microscopy with image editing techniques were used to evaluate the self-healing phenomenon. The results indicate that the samples in accelerated chamber (CAR) presented the highest mechanical strength at 45 days, and the most significant crack closure to samples with Z crystalline admixture. The ultrasonic wave propagation speed analysis showed that crystalline admixtures-based samples (X, Y and Z) had the highest matrix densification. Additionally, special attention should be given to the samples preparing steps and images editing to identify the healed area for the techniques being used.https://www.matec-conferences.org/articles/matecconf/pdf/2023/05/matecconf_smartincs2023_02023.pdf |
| spellingShingle | Tamimi Yasmin da Silva Deividi Pfeuffer Bruno Masuero Angela Dal Molin Denise A self-healing approach to cement-based materials with crystalline admixtures in normal and accelerated environmental conditions MATEC Web of Conferences |
| title | A self-healing approach to cement-based materials with crystalline admixtures in normal and accelerated environmental conditions |
| title_full | A self-healing approach to cement-based materials with crystalline admixtures in normal and accelerated environmental conditions |
| title_fullStr | A self-healing approach to cement-based materials with crystalline admixtures in normal and accelerated environmental conditions |
| title_full_unstemmed | A self-healing approach to cement-based materials with crystalline admixtures in normal and accelerated environmental conditions |
| title_short | A self-healing approach to cement-based materials with crystalline admixtures in normal and accelerated environmental conditions |
| title_sort | self healing approach to cement based materials with crystalline admixtures in normal and accelerated environmental conditions |
| url | https://www.matec-conferences.org/articles/matecconf/pdf/2023/05/matecconf_smartincs2023_02023.pdf |
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