Study of gypsum composites with fine solid aggregates at elevated temperatures

The structure and behaviour of two gypsum composites after exposition to elevated temperatures were investigated. The silica sand and fine basalt aggregate were used as solid fillers. The changes in structure and composition at temperatures from 50 to 1,000°C were investigated by scanning electron m...

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Autores principales:	Doleželová Magdaléna, Scheinherrová Lenka, Vimmrová Alena
Formato:	article
Lenguaje:	EN
Publicado:	De Gruyter 2021
Materias:	gypsum composite elevated temperatures microstructure porosity properties Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/1ea1ce92bef04cd7a5556a455afcd9eb
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spelling	oai:doaj.org-article:1ea1ce92bef04cd7a5556a455afcd9eb2021-12-05T14:11:03ZStudy of gypsum composites with fine solid aggregates at elevated temperatures2191-035910.1515/secm-2021-0025https://doaj.org/article/1ea1ce92bef04cd7a5556a455afcd9eb2021-05-01T00:00:00Zhttps://doi.org/10.1515/secm-2021-0025https://doaj.org/toc/2191-0359The structure and behaviour of two gypsum composites after exposition to elevated temperatures were investigated. The silica sand and fine basalt aggregate were used as solid fillers. The changes in structure and composition at temperatures from 50 to 1,000°C were investigated by scanning electron microscopy and X-ray diffraction together with the size and strength of the samples and their pore size distribution. The structure of gypsum matrix changed significantly at 1,000°C in both composites, while the aggregate particles were not changed. It was found that even if the silica sand is considered as less suitable filler at high temperatures because of its volume changes, the gypsum with sand performed better than gypsum with basalt at the highest temperatures, because the shrinkage of the gypsum matrix was compensated by the increase in the volume of aggregate. The final volume change at 1,000°C was 3.5% in composite with silica sand and 6.8% in composite with basalt. The residual compressive strength of both composites was about 9.4%. No cracks appeared in the samples and no spalling was observed.Doleželová MagdalénaScheinherrová LenkaVimmrová AlenaDe Gruyterarticlegypsum compositeelevated temperaturesmicrostructureporositypropertiesMaterials of engineering and construction. Mechanics of materialsTA401-492ENScience and Engineering of Composite Materials, Vol 28, Iss 1, Pp 237-248 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	gypsum composite elevated temperatures microstructure porosity properties Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	gypsum composite elevated temperatures microstructure porosity properties Materials of engineering and construction. Mechanics of materials TA401-492 Doleželová Magdaléna Scheinherrová Lenka Vimmrová Alena Study of gypsum composites with fine solid aggregates at elevated temperatures
description	The structure and behaviour of two gypsum composites after exposition to elevated temperatures were investigated. The silica sand and fine basalt aggregate were used as solid fillers. The changes in structure and composition at temperatures from 50 to 1,000°C were investigated by scanning electron microscopy and X-ray diffraction together with the size and strength of the samples and their pore size distribution. The structure of gypsum matrix changed significantly at 1,000°C in both composites, while the aggregate particles were not changed. It was found that even if the silica sand is considered as less suitable filler at high temperatures because of its volume changes, the gypsum with sand performed better than gypsum with basalt at the highest temperatures, because the shrinkage of the gypsum matrix was compensated by the increase in the volume of aggregate. The final volume change at 1,000°C was 3.5% in composite with silica sand and 6.8% in composite with basalt. The residual compressive strength of both composites was about 9.4%. No cracks appeared in the samples and no spalling was observed.
format	article
author	Doleželová Magdaléna Scheinherrová Lenka Vimmrová Alena
author_facet	Doleželová Magdaléna Scheinherrová Lenka Vimmrová Alena
author_sort	Doleželová Magdaléna
title	Study of gypsum composites with fine solid aggregates at elevated temperatures
title_short	Study of gypsum composites with fine solid aggregates at elevated temperatures
title_full	Study of gypsum composites with fine solid aggregates at elevated temperatures
title_fullStr	Study of gypsum composites with fine solid aggregates at elevated temperatures
title_full_unstemmed	Study of gypsum composites with fine solid aggregates at elevated temperatures
title_sort	study of gypsum composites with fine solid aggregates at elevated temperatures
publisher	De Gruyter
publishDate	2021
url	https://doaj.org/article/1ea1ce92bef04cd7a5556a455afcd9eb
work_keys_str_mv	AT dolezelovamagdalena studyofgypsumcompositeswithfinesolidaggregatesatelevatedtemperatures AT scheinherrovalenka studyofgypsumcompositeswithfinesolidaggregatesatelevatedtemperatures AT vimmrovaalena studyofgypsumcompositeswithfinesolidaggregatesatelevatedtemperatures
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Study of gypsum composites with fine solid aggregates at elevated temperatures

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