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Volcanic Tuff as Secondary Raw Material in the Production of Clay Bricks

The present work examines an innovative manufacturing technique for fired clay bricks, using tuff as a secondary raw material. Samples were made of clay and tuff (0–30 wt.%) fired at 900 to 1100 °C. The chemical and mineralogical compositions and physical and thermal analyses of raw materials were i...

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Autores principales: Cobîrzan, Nicoleta, Thalmaier, Gyorgy, Balog, Anca-Andreea, Constantinescu, Horia, Ceclan, Andrei, Nasui, Mircea
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8625564/
https://www.ncbi.nlm.nih.gov/pubmed/34832274
http://dx.doi.org/10.3390/ma14226872
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author Cobîrzan, Nicoleta
Thalmaier, Gyorgy
Balog, Anca-Andreea
Constantinescu, Horia
Ceclan, Andrei
Nasui, Mircea
author_facet Cobîrzan, Nicoleta
Thalmaier, Gyorgy
Balog, Anca-Andreea
Constantinescu, Horia
Ceclan, Andrei
Nasui, Mircea
author_sort Cobîrzan, Nicoleta
collection PubMed
description The present work examines an innovative manufacturing technique for fired clay bricks, using tuff as a secondary raw material. Samples were made of clay and tuff (0–30 wt.%) fired at 900 to 1100 °C. The chemical and mineralogical compositions and physical and thermal analyses of raw materials were investigated by using SEM-EDS, RX and DTA-TG curves. The samples were analysed from the mineralogical, technological and mechanical points of view. The result show that the tuff’s presence in the clay mixtures considerably reduced the shrinkage of the product during the firing process, and the manufactured samples were of excellent quality. The compressive strength of the bricks varied from 5–35.3MPa, being influenced by the tuff content, clay matrix properties and firing temperatures. Finally, the heat demand for increasing the temperature from room to the firing temperature of the sample with 10% tuff content was 22%.
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spelling pubmed-86255642021-11-27 Volcanic Tuff as Secondary Raw Material in the Production of Clay Bricks Cobîrzan, Nicoleta Thalmaier, Gyorgy Balog, Anca-Andreea Constantinescu, Horia Ceclan, Andrei Nasui, Mircea Materials (Basel) Article The present work examines an innovative manufacturing technique for fired clay bricks, using tuff as a secondary raw material. Samples were made of clay and tuff (0–30 wt.%) fired at 900 to 1100 °C. The chemical and mineralogical compositions and physical and thermal analyses of raw materials were investigated by using SEM-EDS, RX and DTA-TG curves. The samples were analysed from the mineralogical, technological and mechanical points of view. The result show that the tuff’s presence in the clay mixtures considerably reduced the shrinkage of the product during the firing process, and the manufactured samples were of excellent quality. The compressive strength of the bricks varied from 5–35.3MPa, being influenced by the tuff content, clay matrix properties and firing temperatures. Finally, the heat demand for increasing the temperature from room to the firing temperature of the sample with 10% tuff content was 22%. MDPI 2021-11-15 /pmc/articles/PMC8625564/ /pubmed/34832274 http://dx.doi.org/10.3390/ma14226872 Text en © 2021 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
Cobîrzan, Nicoleta
Thalmaier, Gyorgy
Balog, Anca-Andreea
Constantinescu, Horia
Ceclan, Andrei
Nasui, Mircea
Volcanic Tuff as Secondary Raw Material in the Production of Clay Bricks
title Volcanic Tuff as Secondary Raw Material in the Production of Clay Bricks
title_full Volcanic Tuff as Secondary Raw Material in the Production of Clay Bricks
title_fullStr Volcanic Tuff as Secondary Raw Material in the Production of Clay Bricks
title_full_unstemmed Volcanic Tuff as Secondary Raw Material in the Production of Clay Bricks
title_short Volcanic Tuff as Secondary Raw Material in the Production of Clay Bricks
title_sort volcanic tuff as secondary raw material in the production of clay bricks
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8625564/
https://www.ncbi.nlm.nih.gov/pubmed/34832274
http://dx.doi.org/10.3390/ma14226872
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