About: Microstructural changes and residual properties of fiber reinforced cement composites exposed to elevated temperatures

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The high temperature load causes irreversible changes in the microstructure of cementitious composites resulting in decrease of their mechanical performance and durability. In this paper, the effect of elevated temperatures up to 1000 degrees C on the mineralogical composition and microstructure of four different types of fiber reinforced cement composites is evaluated by means of X-ray diffraction analysis, mercury intrusion porosimetry and nitrogen adsorption porosimetry. The residual properties are characterized by bending strength and apparent moisture diffusivity. Experimental results show that the degradation processes of matrix (gel sintering and aggregates expansion) influence the pore system more significantly than the degradation of thermally unstable fibers. The residual bending strength is positively affected by the thermally stable fibers at least up to 600 degrees C but in a relative sense the strength reduction in composites with this type of fibers is more significant. The apparent moisture diffusivity is found to be exponentially correlated by volume of capillary pores. The high temperature load causes irreversible changes in the microstructure of cementitious composites resulting in decrease of their mechanical performance and durability. In this paper, the effect of elevated temperatures up to 1000 degrees C on the mineralogical composition and microstructure of four different types of fiber reinforced cement composites is evaluated by means of X-ray diffraction analysis, mercury intrusion porosimetry and nitrogen adsorption porosimetry. The residual properties are characterized by bending strength and apparent moisture diffusivity. Experimental results show that the degradation processes of matrix (gel sintering and aggregates expansion) influence the pore system more significantly than the degradation of thermally unstable fibers. The residual bending strength is positively affected by the thermally stable fibers at least up to 600 degrees C but in a relative sense the strength reduction in composites with this type of fibers is more significant. The apparent moisture diffusivity is found to be exponentially correlated by volume of capillary pores. (en)
Title	Microstructural changes and residual properties of fiber reinforced cement composites exposed to elevated temperatures Microstructural changes and residual properties of fiber reinforced cement composites exposed to elevated temperatures (en)
skos:prefLabel	Microstructural changes and residual properties of fiber reinforced cement composites exposed to elevated temperatures Microstructural changes and residual properties of fiber reinforced cement composites exposed to elevated temperatures (en)
skos:notation	RIV/61388980:_____/12:00377485!RIV13-AV0-61388980
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GAP104/12/0791), Z(AV0Z40320502)
http://linked.open...iv/cisloPeriodika	2
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Švarcová, Silvie Bezdička, Petr
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav anorganické chemie AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	150405
http://linked.open...ai/riv/idVysledku	RIV/61388980:_____/12:00377485
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	fiber reinforced cementcomposites; high temperatures; mineralodical composition; microstructure; residual strength; apparent moisture diffusivity (en)
http://linked.open.../riv/klicoveSlovo	microstructure apparent moisture diffusivity fiber reinforced cementcomposites mineralodical composition residual strength high temperatures
http://linked.open...odStatuVydavatele	PL - Polská republika
http://linked.open...ontrolniKodProRIV	[914DC9C01C8D]
http://linked.open...i/riv/nazevZdroje	Cement Wapno Beton
http://linked.open...in/vavai/riv/obor	JI
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	5 (xsd:int)
http://linked.open...vavai/riv/projekt	Fiber-Reinforced Cement Composites for High-Temperature Applications
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	17
http://linked.open...iv/tvurceVysledku	Bezdička, Petr Černý, R. Švarcová, Silvie Keppert, M. Vejmelková, E.
http://linked.open...ain/vavai/riv/wos	000302969900002
http://linked.open...n/vavai/riv/zamer	Design, syntéza a charakterizace klastrů, kompozitů, komplexů a dalších sloučenin na bázi anorganických látek; mechanismy a kinetika jejich interakcí
issn	1425-8129
number of pages	13 (xsd:int)

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