Impact of Elevated Temperatures on Strength Properties and Microstructure of Calcium Sulfoaluminate Paste

This article is motivated by civil fire safety. Fire-prevention engineering demands a wide range of information about building materials including alternative cements, for instance CSA-cement. Because of exposure of the cement-base material to a high temperature, its strength properties deteriorate...

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Autores principales:	Konrad A. Sodol, Łukasz Kaczmarek, Jacek Szer, Sebastian Miszczak, Mariusz Stegliński
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	calcium sulfoaluminate high-temperature microstructure strength green binder cement Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
Acceso en línea:	https://doaj.org/article/54edef32822d409e9436adb2705bd061
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spelling	oai:doaj.org-article:54edef32822d409e9436adb2705bd0612021-11-25T18:13:16ZImpact of Elevated Temperatures on Strength Properties and Microstructure of Calcium Sulfoaluminate Paste10.3390/ma142267511996-1944https://doaj.org/article/54edef32822d409e9436adb2705bd0612021-11-01T00:00:00Zhttps://www.mdpi.com/1996-1944/14/22/6751https://doaj.org/toc/1996-1944This article is motivated by civil fire safety. Fire-prevention engineering demands a wide range of information about building materials including alternative cements, for instance CSA-cement. Because of exposure of the cement-base material to a high temperature, its strength properties deteriorate due to dehydration connected with phase and microstructure changes. Previous research indicated that the main endothermic reaction of CSA-based composite, dehydration of ettringite, might be used as a cooling system for a metal structure during fire-load. This article examines visual assessment, microstructure, density, as well as flexural and compressive strength parameters of CSA-based composite after isothermal heating at temperatures from 23 °C to 800 °C. The results of SEM/EDS investigations showed that the calcium sulfoaluminate paste may start partially re-sintering above 600 °C. Mechanical tests revealed significant reduction of strength parameters but residual compressive strength was maintained in the whole temperature range e.g., 8 MPa at 800 °C. Additionally, visual assessment of the specimens indicated that it might be possible to predict the material temperature heating based on the specific surface color. These findings add to the evidence of general knowledge about CSA hydrates.Konrad A. SodolŁukasz KaczmarekJacek SzerSebastian MiszczakMariusz SteglińskiMDPI AGarticlecalcium sulfoaluminatehigh-temperaturemicrostructurestrengthgreen bindercementTechnologyTElectrical engineering. Electronics. Nuclear engineeringTK1-9971Engineering (General). Civil engineering (General)TA1-2040MicroscopyQH201-278.5Descriptive and experimental mechanicsQC120-168.85ENMaterials, Vol 14, Iss 6751, p 6751 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	calcium sulfoaluminate high-temperature microstructure strength green binder cement Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85
spellingShingle	calcium sulfoaluminate high-temperature microstructure strength green binder cement Technology T Electrical engineering. Electronics. Nuclear engineering TK1-9971 Engineering (General). Civil engineering (General) TA1-2040 Microscopy QH201-278.5 Descriptive and experimental mechanics QC120-168.85 Konrad A. Sodol Łukasz Kaczmarek Jacek Szer Sebastian Miszczak Mariusz Stegliński Impact of Elevated Temperatures on Strength Properties and Microstructure of Calcium Sulfoaluminate Paste
description	This article is motivated by civil fire safety. Fire-prevention engineering demands a wide range of information about building materials including alternative cements, for instance CSA-cement. Because of exposure of the cement-base material to a high temperature, its strength properties deteriorate due to dehydration connected with phase and microstructure changes. Previous research indicated that the main endothermic reaction of CSA-based composite, dehydration of ettringite, might be used as a cooling system for a metal structure during fire-load. This article examines visual assessment, microstructure, density, as well as flexural and compressive strength parameters of CSA-based composite after isothermal heating at temperatures from 23 °C to 800 °C. The results of SEM/EDS investigations showed that the calcium sulfoaluminate paste may start partially re-sintering above 600 °C. Mechanical tests revealed significant reduction of strength parameters but residual compressive strength was maintained in the whole temperature range e.g., 8 MPa at 800 °C. Additionally, visual assessment of the specimens indicated that it might be possible to predict the material temperature heating based on the specific surface color. These findings add to the evidence of general knowledge about CSA hydrates.
format	article
author	Konrad A. Sodol Łukasz Kaczmarek Jacek Szer Sebastian Miszczak Mariusz Stegliński
author_facet	Konrad A. Sodol Łukasz Kaczmarek Jacek Szer Sebastian Miszczak Mariusz Stegliński
author_sort	Konrad A. Sodol
title	Impact of Elevated Temperatures on Strength Properties and Microstructure of Calcium Sulfoaluminate Paste
title_short	Impact of Elevated Temperatures on Strength Properties and Microstructure of Calcium Sulfoaluminate Paste
title_full	Impact of Elevated Temperatures on Strength Properties and Microstructure of Calcium Sulfoaluminate Paste
title_fullStr	Impact of Elevated Temperatures on Strength Properties and Microstructure of Calcium Sulfoaluminate Paste
title_full_unstemmed	Impact of Elevated Temperatures on Strength Properties and Microstructure of Calcium Sulfoaluminate Paste
title_sort	impact of elevated temperatures on strength properties and microstructure of calcium sulfoaluminate paste
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/54edef32822d409e9436adb2705bd061
work_keys_str_mv	AT konradasodol impactofelevatedtemperaturesonstrengthpropertiesandmicrostructureofcalciumsulfoaluminatepaste AT łukaszkaczmarek impactofelevatedtemperaturesonstrengthpropertiesandmicrostructureofcalciumsulfoaluminatepaste AT jacekszer impactofelevatedtemperaturesonstrengthpropertiesandmicrostructureofcalciumsulfoaluminatepaste AT sebastianmiszczak impactofelevatedtemperaturesonstrengthpropertiesandmicrostructureofcalciumsulfoaluminatepaste AT mariuszsteglinski impactofelevatedtemperaturesonstrengthpropertiesandmicrostructureofcalciumsulfoaluminatepaste
_version_	1718411437292912640

Impact of Elevated Temperatures on Strength Properties and Microstructure of Calcium Sulfoaluminate Paste

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