Detail publikace
Hygrothermal properties off glass fiber reinforced cements subject to elevated temperature
ČERNÝ, R. PODĚBRADSKÁ, J. TOTOVÁ, M. TOMAN, J. DRCHALOVÁ, J. ROVNANÍKOVÁ, P. BAYER, P.
Originální název
Hygrothermal properties off glass fiber reinforced cements subject to elevated temperature
Anglický název
Hygrothermal properties off glass fiber reinforced cements subject to elevated temperature
Jazyk
en
Originální abstrakt
The effect elevated temperatures on basic hybrid and thermal properties of three types of glass fiber reinforced cement composites (GFRC) is analyzed in the paper. The main difference in the composition of particular GFRC is the use of wollastonite and vermiculite in two of them instead of usual sand aggregates. The composites containing wollastonite and vermiculite are found to have about four times lower thermal conductivity and two to three times lower thermal diffusivity in room temperature conditions. After heating the samples to 800C deg. and subsequent cooling, a decrease in room-temperature thermal conductivity as high as 50% and an increase in moisture diffusivity in the range of one to two orders of magnitude are observed for all types of studied materials. The application of wollastonite and vermiculite exhibits a positive effect on the high temperature linear thermal expansion coefficient. On the other hand, for temperatures higher than 450 C deg. the thermal diffusivity of materials with wollastonite and vermiculite is higher than of common GFRC with sand aggregates.
Anglický abstrakt
The effect elevated temperatures on basic hybrid and thermal properties of three types of glass fiber reinforced cement composites (GFRC) is analyzed in the paper. The main difference in the composition of particular GFRC is the use of wollastonite and vermiculite in two of them instead of usual sand aggregates. The composites containing wollastonite and vermiculite are found to have about four times lower thermal conductivity and two to three times lower thermal diffusivity in room temperature conditions. After heating the samples to 800C deg. and subsequent cooling, a decrease in room-temperature thermal conductivity as high as 50% and an increase in moisture diffusivity in the range of one to two orders of magnitude are observed for all types of studied materials. The application of wollastonite and vermiculite exhibits a positive effect on the high temperature linear thermal expansion coefficient. On the other hand, for temperatures higher than 450 C deg. the thermal diffusivity of materials with wollastonite and vermiculite is higher than of common GFRC with sand aggregates.
Dokumenty
BibTex
@article{BUT46247,
author="Robert {Černý} and Jitka {Poděbradská} and Michaela {Totová} and Jan {Toman} and Jaroslava {Drchalová} and Pavla {Rovnaníková} and Patrik {Bayer}",
title="Hygrothermal properties off glass fiber reinforced cements subject to elevated temperature",
annote="The effect elevated temperatures on basic hybrid and thermal properties of three types of glass fiber reinforced cement composites (GFRC) is analyzed in the paper. The main difference in the composition of particular GFRC is the use of wollastonite and vermiculite in two of them instead of usual sand aggregates. The composites containing wollastonite and vermiculite are found to have about four times lower thermal conductivity and two to three times lower thermal diffusivity in room temperature conditions. After heating the samples to 800C deg. and subsequent cooling, a decrease in room-temperature thermal conductivity as high as 50% and an increase in moisture diffusivity in the range of one to two orders of magnitude are observed for all types of studied materials. The application of wollastonite and vermiculite exhibits a positive effect on the high temperature linear thermal expansion coefficient. On the other hand, for temperatures higher than 450 C deg. the thermal diffusivity of materials with wollastonite and vermiculite is higher than of common GFRC with sand aggregates.",
chapter="46247",
journal="Materials and Structures",
number="37",
year="2004",
month="january",
pages="597",
type="journal article - other"
}