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Study on Deterioration Law and Mechanism of Gray Brick Due to Salt Crystallization

Salinization has an important impact on the degradation of ancient masonry buildings, and systematically mastering the law of salt migration and degradation of ancient masonry buildings is an important part of the protection of ancient buildings. In this paper, the damage law of gray bricks under th...

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Autores principales: Yue, Jianwei, Li, Yuan, Luo, Zhenxian, Huang, Xuanjia, Kong, Qingmei, Wang, Zifa
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9024910/
https://www.ncbi.nlm.nih.gov/pubmed/35454629
http://dx.doi.org/10.3390/ma15082936
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author Yue, Jianwei
Li, Yuan
Luo, Zhenxian
Huang, Xuanjia
Kong, Qingmei
Wang, Zifa
author_facet Yue, Jianwei
Li, Yuan
Luo, Zhenxian
Huang, Xuanjia
Kong, Qingmei
Wang, Zifa
author_sort Yue, Jianwei
collection PubMed
description Salinization has an important impact on the degradation of ancient masonry buildings, and systematically mastering the law of salt migration and degradation of ancient masonry buildings is an important part of the protection of ancient buildings. In this paper, the damage law of gray bricks under the action of salt crystallization is studied. The orthogonal test method is used to carry out cyclic degradation tests on gray bricks. The nominal strength is proposed as a mechanical parameter to measure the structural damage of grey bricks, and the change in compressive strength and crystallization pressure of the samples after the test is measured and analyzed. The results show that the damage of different salts in the gray bricks shows a certain difference. Magnesium sulfate and sodium chloride cause significant damage to the surface of the gray bricks, while calcium chloride does not cause significant damage to the surface of the gray bricks. When the concentrations of sodium chloride solution, calcium chloride solution and magnesium sulfate solution are less than 13.73 mol/L, 11.47 mol/L and 17 mol/L, respectively, the nominal strength of gray brick samples increases; In the range of 9.9 mol/L and 4.73–8.94 mol/L, the crystallization pressure began to appear inside the sample. The research results provide an important scientific basis for evaluating the damage caused by salting to the damage of porous ancient building materials such as masonry.
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spelling pubmed-90249102022-04-23 Study on Deterioration Law and Mechanism of Gray Brick Due to Salt Crystallization Yue, Jianwei Li, Yuan Luo, Zhenxian Huang, Xuanjia Kong, Qingmei Wang, Zifa Materials (Basel) Article Salinization has an important impact on the degradation of ancient masonry buildings, and systematically mastering the law of salt migration and degradation of ancient masonry buildings is an important part of the protection of ancient buildings. In this paper, the damage law of gray bricks under the action of salt crystallization is studied. The orthogonal test method is used to carry out cyclic degradation tests on gray bricks. The nominal strength is proposed as a mechanical parameter to measure the structural damage of grey bricks, and the change in compressive strength and crystallization pressure of the samples after the test is measured and analyzed. The results show that the damage of different salts in the gray bricks shows a certain difference. Magnesium sulfate and sodium chloride cause significant damage to the surface of the gray bricks, while calcium chloride does not cause significant damage to the surface of the gray bricks. When the concentrations of sodium chloride solution, calcium chloride solution and magnesium sulfate solution are less than 13.73 mol/L, 11.47 mol/L and 17 mol/L, respectively, the nominal strength of gray brick samples increases; In the range of 9.9 mol/L and 4.73–8.94 mol/L, the crystallization pressure began to appear inside the sample. The research results provide an important scientific basis for evaluating the damage caused by salting to the damage of porous ancient building materials such as masonry. MDPI 2022-04-18 /pmc/articles/PMC9024910/ /pubmed/35454629 http://dx.doi.org/10.3390/ma15082936 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yue, Jianwei
Li, Yuan
Luo, Zhenxian
Huang, Xuanjia
Kong, Qingmei
Wang, Zifa
Study on Deterioration Law and Mechanism of Gray Brick Due to Salt Crystallization
title Study on Deterioration Law and Mechanism of Gray Brick Due to Salt Crystallization
title_full Study on Deterioration Law and Mechanism of Gray Brick Due to Salt Crystallization
title_fullStr Study on Deterioration Law and Mechanism of Gray Brick Due to Salt Crystallization
title_full_unstemmed Study on Deterioration Law and Mechanism of Gray Brick Due to Salt Crystallization
title_short Study on Deterioration Law and Mechanism of Gray Brick Due to Salt Crystallization
title_sort study on deterioration law and mechanism of gray brick due to salt crystallization
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9024910/
https://www.ncbi.nlm.nih.gov/pubmed/35454629
http://dx.doi.org/10.3390/ma15082936
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