Continuum micromechanics model for fired clay bricks: Upscaling of experimentally identified microstructural features to macroscopic elastic stiffness and thermal conductivity

Quantification of elastic stiffness and thermal conductivity of fired clay bricks is still often limited to empirical rules and laboratory testing, which becomes progressively more challenging given the large variety of raw materials used to optimize the properties of modern brick products. Applying...

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Autores principales:	Thomas Buchner, Thomas Kiefer, Markus Königsberger, Andreas Jäger, Josef Füssl
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Clay brick Multiscale model Elastic stiffness Thermal conductivity Materials of engineering and construction. Mechanics of materials TA401-492
Acceso en línea:	https://doaj.org/article/ad3b8c5c4b2e43d58726b97122895cbe
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spelling	oai:doaj.org-article:ad3b8c5c4b2e43d58726b97122895cbe2021-11-12T04:24:39ZContinuum micromechanics model for fired clay bricks: Upscaling of experimentally identified microstructural features to macroscopic elastic stiffness and thermal conductivity0264-127510.1016/j.matdes.2021.110212https://doaj.org/article/ad3b8c5c4b2e43d58726b97122895cbe2021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S026412752100767Xhttps://doaj.org/toc/0264-1275Quantification of elastic stiffness and thermal conductivity of fired clay bricks is still often limited to empirical rules and laboratory testing, which becomes progressively more challenging given the large variety of raw materials used to optimize the properties of modern brick products. Applying a continuum micromechanics multiscale approach, we herein aim at upscaling of microstructural features to quantify the bricks’ macroscopic properties. Microstructural features such as assemblage and morphometry of mineral phases (quartz, feldspar, and micas), of pores, and of the binding matrix phase, respectively, as well as thermoelastic phase properties are provided by recently published results from extensive microscopic testing including electron microscopy imaging, mercury intrusion porosimetry, nanoindentation, and scanning thermal microscopy. These results are incorporated into the micromechanics model by introducing spheroidal phases with characteristic orientation distribution at two observation scales. The homogenized macroscopic stiffness and conductivity agree very well with independent results from novel macroscopic tests for all seven studied brick compositions. This corroborates the microstructure-informed multiscale model approach and its assumptions: the linear increase of the binding matrix properties with the material’s carbonate content, and the inability of large quartz with interface cracks to take over any mechanical loads.Thomas BuchnerThomas KieferMarkus KönigsbergerAndreas JägerJosef FüsslElsevierarticleClay brickMultiscale modelElastic stiffnessThermal conductivityMaterials of engineering and construction. Mechanics of materialsTA401-492ENMaterials & Design, Vol 212, Iss , Pp 110212- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Clay brick Multiscale model Elastic stiffness Thermal conductivity Materials of engineering and construction. Mechanics of materials TA401-492
spellingShingle	Clay brick Multiscale model Elastic stiffness Thermal conductivity Materials of engineering and construction. Mechanics of materials TA401-492 Thomas Buchner Thomas Kiefer Markus Königsberger Andreas Jäger Josef Füssl Continuum micromechanics model for fired clay bricks: Upscaling of experimentally identified microstructural features to macroscopic elastic stiffness and thermal conductivity
description	Quantification of elastic stiffness and thermal conductivity of fired clay bricks is still often limited to empirical rules and laboratory testing, which becomes progressively more challenging given the large variety of raw materials used to optimize the properties of modern brick products. Applying a continuum micromechanics multiscale approach, we herein aim at upscaling of microstructural features to quantify the bricks’ macroscopic properties. Microstructural features such as assemblage and morphometry of mineral phases (quartz, feldspar, and micas), of pores, and of the binding matrix phase, respectively, as well as thermoelastic phase properties are provided by recently published results from extensive microscopic testing including electron microscopy imaging, mercury intrusion porosimetry, nanoindentation, and scanning thermal microscopy. These results are incorporated into the micromechanics model by introducing spheroidal phases with characteristic orientation distribution at two observation scales. The homogenized macroscopic stiffness and conductivity agree very well with independent results from novel macroscopic tests for all seven studied brick compositions. This corroborates the microstructure-informed multiscale model approach and its assumptions: the linear increase of the binding matrix properties with the material’s carbonate content, and the inability of large quartz with interface cracks to take over any mechanical loads.
format	article
author	Thomas Buchner Thomas Kiefer Markus Königsberger Andreas Jäger Josef Füssl
author_facet	Thomas Buchner Thomas Kiefer Markus Königsberger Andreas Jäger Josef Füssl
author_sort	Thomas Buchner
title	Continuum micromechanics model for fired clay bricks: Upscaling of experimentally identified microstructural features to macroscopic elastic stiffness and thermal conductivity
title_short	Continuum micromechanics model for fired clay bricks: Upscaling of experimentally identified microstructural features to macroscopic elastic stiffness and thermal conductivity
title_full	Continuum micromechanics model for fired clay bricks: Upscaling of experimentally identified microstructural features to macroscopic elastic stiffness and thermal conductivity
title_fullStr	Continuum micromechanics model for fired clay bricks: Upscaling of experimentally identified microstructural features to macroscopic elastic stiffness and thermal conductivity
title_full_unstemmed	Continuum micromechanics model for fired clay bricks: Upscaling of experimentally identified microstructural features to macroscopic elastic stiffness and thermal conductivity
title_sort	continuum micromechanics model for fired clay bricks: upscaling of experimentally identified microstructural features to macroscopic elastic stiffness and thermal conductivity
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/ad3b8c5c4b2e43d58726b97122895cbe
work_keys_str_mv	AT thomasbuchner continuummicromechanicsmodelforfiredclaybricksupscalingofexperimentallyidentifiedmicrostructuralfeaturestomacroscopicelasticstiffnessandthermalconductivity AT thomaskiefer continuummicromechanicsmodelforfiredclaybricksupscalingofexperimentallyidentifiedmicrostructuralfeaturestomacroscopicelasticstiffnessandthermalconductivity AT markuskonigsberger continuummicromechanicsmodelforfiredclaybricksupscalingofexperimentallyidentifiedmicrostructuralfeaturestomacroscopicelasticstiffnessandthermalconductivity AT andreasjager continuummicromechanicsmodelforfiredclaybricksupscalingofexperimentallyidentifiedmicrostructuralfeaturestomacroscopicelasticstiffnessandthermalconductivity AT joseffussl continuummicromechanicsmodelforfiredclaybricksupscalingofexperimentallyidentifiedmicrostructuralfeaturestomacroscopicelasticstiffnessandthermalconductivity
_version_	1718431309326450688

Continuum micromechanics model for fired clay bricks: Upscaling of experimentally identified microstructural features to macroscopic elastic stiffness and thermal conductivity

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