Autogenous Healing of Early-Age Cracks in Cementitious Materials by Superabsorbent Polymers

The effect of superabsorbent polymers (SAPs) on autogenous crack healing in cementitious materials with early-age cracking was investigated. SAP-containing samples exposed to wet/dry cycles showed better autogenous healing than those only exposed to wet conditions, as determined by water flow and co...

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Detalles Bibliográficos
Autores principales: Hong, Geuntae, Song, Chiwon, Choi, Seongcheol
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Article
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7040729/
https://www.ncbi.nlm.nih.gov/pubmed/32033077
http://dx.doi.org/10.3390/ma13030690
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author Hong, Geuntae
Song, Chiwon
Choi, Seongcheol
author_facet Hong, Geuntae
Song, Chiwon
Choi, Seongcheol
author_sort Hong, Geuntae
collection PubMed
description The effect of superabsorbent polymers (SAPs) on autogenous crack healing in cementitious materials with early-age cracking was investigated. SAP-containing samples exposed to wet/dry cycles showed better autogenous healing than those only exposed to wet conditions, as determined by water flow and compressive strength recovery tests. The water flow rates through cracks (380 ± 40 µm) in cement paste and cement mortar containing 1.0% SAP decreased by around 97.1–100% and 79.7–90.7%, respectively, after 14 cycles of healing compared to 1 cycle. Although the initial compressive strength decreased with SAP addition, it recovered somewhat after a 28-d healing period. Microscopy and spectroscopy results identified CaCO(3) and/or calcium silicate hydrate (CSH) as the main healing products.
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spelling pubmed-70407292020-03-09 Autogenous Healing of Early-Age Cracks in Cementitious Materials by Superabsorbent Polymers Hong, Geuntae Song, Chiwon Choi, Seongcheol Materials (Basel) Article The effect of superabsorbent polymers (SAPs) on autogenous crack healing in cementitious materials with early-age cracking was investigated. SAP-containing samples exposed to wet/dry cycles showed better autogenous healing than those only exposed to wet conditions, as determined by water flow and compressive strength recovery tests. The water flow rates through cracks (380 ± 40 µm) in cement paste and cement mortar containing 1.0% SAP decreased by around 97.1–100% and 79.7–90.7%, respectively, after 14 cycles of healing compared to 1 cycle. Although the initial compressive strength decreased with SAP addition, it recovered somewhat after a 28-d healing period. Microscopy and spectroscopy results identified CaCO(3) and/or calcium silicate hydrate (CSH) as the main healing products. MDPI 2020-02-04 /pmc/articles/PMC7040729/ /pubmed/32033077 http://dx.doi.org/10.3390/ma13030690 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Hong, Geuntae
Song, Chiwon
Choi, Seongcheol
Autogenous Healing of Early-Age Cracks in Cementitious Materials by Superabsorbent Polymers
title Autogenous Healing of Early-Age Cracks in Cementitious Materials by Superabsorbent Polymers
title_full Autogenous Healing of Early-Age Cracks in Cementitious Materials by Superabsorbent Polymers
title_fullStr Autogenous Healing of Early-Age Cracks in Cementitious Materials by Superabsorbent Polymers
title_full_unstemmed Autogenous Healing of Early-Age Cracks in Cementitious Materials by Superabsorbent Polymers
title_short Autogenous Healing of Early-Age Cracks in Cementitious Materials by Superabsorbent Polymers
title_sort autogenous healing of early-age cracks in cementitious materials by superabsorbent polymers
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7040729/
https://www.ncbi.nlm.nih.gov/pubmed/32033077
http://dx.doi.org/10.3390/ma13030690
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AT songchiwon autogenoushealingofearlyagecracksincementitiousmaterialsbysuperabsorbentpolymers
AT choiseongcheol autogenoushealingofearlyagecracksincementitiousmaterialsbysuperabsorbentpolymers

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