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

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 ph...

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Asıl Yazarlar:	Silva, Deividi Maurente Gomes da, Cappellesso, Vanessa Giaretton, Garcia, Maurício Germano Lopes, Masuero, Angela Borges, Dal Molin, Denise Carpena Coitinho
Materyal Türü:	Online
Dil:	eng
Baskı/Yayın Bilgisi:	ANTAC - Associação Nacional de Tecnologia do Ambiente Construído 2021
Online Erişim:	https://seer.ufrgs.br/ambienteconstruido/article/view/105838
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record_format	ojs
spelling	ojs-article-1058382021-03-12T21:59:21Z Calcium hydroxide influence in autogenous self-healing of cement-based materials in various environmental conditions Silva, Deividi Maurente Gomes da Cappellesso, Vanessa Giaretton Garcia, Maurício Germano Lopes Masuero, Angela Borges Dal Molin, Denise Carpena Coitinho Civil construction; Autogenous Self-healing; Cement-based materials 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. ANTAC - Associação Nacional de Tecnologia do Ambiente Construído Comissão de aperfeiçoamento de pessoal de nível superior, Laboratório de Materiais e Tecnologia do Ambiente Construído, Universidade Federal do Rio Grande do Sul 2021-03-12 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion https://seer.ufrgs.br/ambienteconstruido/article/view/105838 Ambiente Construído; v. 21, n. 2 (2021); 209-224 Ambiente Construído; v. 21, n. 2 (2021); 209-224 Ambiente Construído; v. 21, n. 2 (2021); 209-224 1678-8621 1415-8876 eng https://seer.ufrgs.br/ambienteconstruido/article/view/105838/60999 Direitos autorais 2021 Ambiente Construído https://creativecommons.org/licenses/by/4.0
institution	Universidade Federal do Rio Grande do Sul
collection	OJS
language	eng
format	Online
author	Silva, Deividi Maurente Gomes da Cappellesso, Vanessa Giaretton Garcia, Maurício Germano Lopes Masuero, Angela Borges Dal Molin, Denise Carpena Coitinho
spellingShingle	Silva, Deividi Maurente Gomes da Cappellesso, Vanessa Giaretton Garcia, Maurício Germano Lopes Masuero, Angela Borges Dal Molin, Denise Carpena Coitinho Calcium hydroxide influence in autogenous self-healing of cement-based materials in various environmental conditions
author_facet	Silva, Deividi Maurente Gomes da Cappellesso, Vanessa Giaretton Garcia, Maurício Germano Lopes Masuero, Angela Borges Dal Molin, Denise Carpena Coitinho
author_sort	Silva, Deividi Maurente Gomes da
title	Calcium hydroxide influence in autogenous self-healing of cement-based materials in various environmental conditions
title_short	Calcium hydroxide influence in autogenous self-healing of cement-based materials in various environmental conditions
title_full	Calcium hydroxide influence in autogenous self-healing of cement-based materials in various environmental conditions
title_fullStr	Calcium hydroxide influence in autogenous self-healing of cement-based materials in various environmental conditions
title_full_unstemmed	Calcium hydroxide influence in autogenous self-healing of cement-based materials in various environmental conditions
title_sort	calcium hydroxide influence in autogenous self-healing of cement-based materials in various environmental conditions
description	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.
publisher	ANTAC - Associação Nacional de Tecnologia do Ambiente Construído
publishDate	2021
url	https://seer.ufrgs.br/ambienteconstruido/article/view/105838
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Calcium hydroxide influence in autogenous self-healing of cement-based materials in various environmental conditions

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