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Long-Term Behavior and Durability of Alkali-Activated Clay Mortars

The need to increase the durability of clay-based materials, due to their inherent low strength and vulnerability in contact with water, led researchers to examine different options. In this paper, clay mortars were produced using four different activating solutions. Alkali hydroxides, alkali carbon...

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Autores principales: Karozou, Aspasia, Konopisi, Stavroula, Pavlidou, Eleni, Stefanidou, Maria
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7503674/
https://www.ncbi.nlm.nih.gov/pubmed/32867348
http://dx.doi.org/10.3390/ma13173790
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author Karozou, Aspasia
Konopisi, Stavroula
Pavlidou, Eleni
Stefanidou, Maria
author_facet Karozou, Aspasia
Konopisi, Stavroula
Pavlidou, Eleni
Stefanidou, Maria
author_sort Karozou, Aspasia
collection PubMed
description The need to increase the durability of clay-based materials, due to their inherent low strength and vulnerability in contact with water, led researchers to examine different options. In this paper, clay mortars were produced using four different activating solutions. Alkali hydroxides, alkali carbonates, and alkali silicates activating solutions were used. Interest is given to long term properties while their behavior to wetting–drying and freeze–thaw cycles is recorded. In total, the results of the experiments indicated the positive effect of the potassium metasilicate on mechanical characteristics presenting, however, low performance at wetting–drying. The combination of sodium metasilicate with sodium hydroxide solution has also presented a positive effect on both mechanical and physical properties. In contrast, sodium carbonate acted better in enhancing physical properties and granting water-resistant abilities. Moreover, the performance of the specimens mixed with water–glass addition presented excellent volume stability and low mass loss in durability tests.
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spelling pubmed-75036742020-09-27 Long-Term Behavior and Durability of Alkali-Activated Clay Mortars Karozou, Aspasia Konopisi, Stavroula Pavlidou, Eleni Stefanidou, Maria Materials (Basel) Article The need to increase the durability of clay-based materials, due to their inherent low strength and vulnerability in contact with water, led researchers to examine different options. In this paper, clay mortars were produced using four different activating solutions. Alkali hydroxides, alkali carbonates, and alkali silicates activating solutions were used. Interest is given to long term properties while their behavior to wetting–drying and freeze–thaw cycles is recorded. In total, the results of the experiments indicated the positive effect of the potassium metasilicate on mechanical characteristics presenting, however, low performance at wetting–drying. The combination of sodium metasilicate with sodium hydroxide solution has also presented a positive effect on both mechanical and physical properties. In contrast, sodium carbonate acted better in enhancing physical properties and granting water-resistant abilities. Moreover, the performance of the specimens mixed with water–glass addition presented excellent volume stability and low mass loss in durability tests. MDPI 2020-08-27 /pmc/articles/PMC7503674/ /pubmed/32867348 http://dx.doi.org/10.3390/ma13173790 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
Karozou, Aspasia
Konopisi, Stavroula
Pavlidou, Eleni
Stefanidou, Maria
Long-Term Behavior and Durability of Alkali-Activated Clay Mortars
title Long-Term Behavior and Durability of Alkali-Activated Clay Mortars
title_full Long-Term Behavior and Durability of Alkali-Activated Clay Mortars
title_fullStr Long-Term Behavior and Durability of Alkali-Activated Clay Mortars
title_full_unstemmed Long-Term Behavior and Durability of Alkali-Activated Clay Mortars
title_short Long-Term Behavior and Durability of Alkali-Activated Clay Mortars
title_sort long-term behavior and durability of alkali-activated clay mortars
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7503674/
https://www.ncbi.nlm.nih.gov/pubmed/32867348
http://dx.doi.org/10.3390/ma13173790
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