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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F12%3A00193062" target="_blank" >RIV/68407700:21110/12:00193062 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61388980:_____/12:00377485

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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 °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 °C but in a relative sense the strength reduction in composites with this type of fibers is more significant. The apparent m

Název v anglickém jazyce

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

Popis výsledku anglicky

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 °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 °C but in a relative sense the strength reduction in composites with this type of fibers is more significant. The apparent m

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JI - Kompositní materiály

OECD FORD obor

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Projekt

<a href="/cs/project/GAP104%2F12%2F0791" target="_blank" >GAP104/12/0791: Vláknové kompozity na bázi cementu pro vysokoteplotní aplikace</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Cement Wapno Beton

ISSN

1425-8129

e-ISSN

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Svazek periodika

17/79

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

PL - Polská republika

Počet stran výsledku

13

Strana od-do

77-89

Kód UT WoS článku

000302969900002

EID výsledku v databázi Scopus

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