Calcium hydroxide influence in autogenous self-healing of cement-based materials in various environmental conditions

Authors

Keywords:

Civil construction, Autogenous Self-healing, Cement-based materials

Abstract

Several factors, such as chemical shrinkage or environmental attack can produce concrete cracks. Calcium hydroxide content from the environment or cement hydration can promote the self-healing phenomenon (SHP). This study evaluates the calcium hydroxide concentration influence on the self-healing phenomenon of cement-based materials. Cracked mortars with different types of cement, such as a filler, pozzolanic, and high initial strength, were exposed to four environmental conditions. Titration was the method proposed to determine the amount of calcium hydroxide content leached in the water, and the cracks closure were analyzed by optical microscopy. CPII F (Portland Cement, type II, compound with limestone) samples showed no trend to Ca(OH)2 leached, and to superficial cracking closure. Regarding CPV (Portland cement, type V, high initial strength cement) samples, their behavior showed the highest Ca(OH)2 content to all environmental exposure, and cracking closure to samples in submerged condition. Thus, a significant influence in the cracks´ closure regarding the presence of Ca2+ leached to the exposure environments, and a water source related to this behavior seems to be a primary factor to improve the SHP.

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Author Biographies

Deividi Maurente Gomes da Silva, Universidade Federal do Rio Grande do Sul

Núcleo Orientado à Inovação na Edificação (NORIE)

Vanessa Giaretton Cappellesso, Universidade Federal do Rio Grande do Sul

Núcleo Orientado à Inovação na Edificação (NORIE)

Maurício Germano Lopes Garcia, Universidade Federal do Rio Grande do Sul

Núcleo Orientado à Inovação na Edificação (NORIE)

Angela Borges Masuero, Universidade Federal do Rio Grande do Sul

Núcleo Orientado à Inovação na Edificação (NORIE)

Denise Carpena Coitinho Dal Molin, Universidade Federal do Rio Grande do Sul

Núcleo Orientado à Inovação na Edificação (NORIE)

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Published

2021-03-12

How to Cite

SILVA, D. M. G. da; CAPPELLESSO, V. G.; GARCIA, M. G. L.; MASUERO, A. B.; DAL MOLIN, D. C. C. Calcium hydroxide influence in autogenous self-healing of cement-based materials in various environmental conditions. Ambiente Construído, [S. l.], v. 21, n. 2, p. 209–224, 2021. Disponível em: https://seer.ufrgs.br/index.php/ambienteconstruido/article/view/105838. Acesso em: 25 jun. 2025.

Issue

Vol. 21 No. 2 (2021)

Section

Special Issue

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ISSN 1678-8621

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