Communications - Scientific Letters of the University of Zilina 2002, 4(3):41-44 | DOI: 10.26552/com.C.2002.3.41-44

Thermal Load Induced Changes of Hygric and Thermal Properties of Glass Fiber Reinforced Cement Composites

Robert Cerny1, Michaela Totova1, Jan Toman2, Jaroslava Drchalova2, Pavla Rovnanikova3, Patrik Bayer3
1 Czech Technical University, Faculty of Civil Engineering, Department of Structural Mechanics, Praha, Czech Republic
2 Czech Technical University, Faculty of Civil Engineering, Department of Physics, Praha, Czech Republic
3 Institute of Chemistry, Faculty of Civil Engineering, Technical University of Brno, Czech Republic

The effect of thermal load on the basic thermal and hygric properties of two types of glass fiber reinforced cement composites (GFRCC) is analyzed in the paper. Thermal conductivity, specific heat and moisture diffusivity are determined after high temperature exposure to 600 and 800 °C. A decrease of thermal conductivity as high as 50 % and an increase of moisture diffusivity in the range of one to two orders of magnitude are observed for all types of the studied materials after heating to 800 °C. On the other hand, specific heat and density in the same situation decrease by only about 10 %. In the analysis of the reasons for the measured differences between hygric and thermal parameters of thermally loaded and unloaded samples, pore distribution measurements, scanning electron microscopy and thermal analysis are employed.

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Published: September 30, 2002  Show citation

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Cerny, R., Totova, M., Toman, J., Drchalova, J., Rovnanikova, P., & Bayer, P. (2002). Thermal Load Induced Changes of Hygric and Thermal Properties of Glass Fiber Reinforced Cement Composites. Communications - Scientific Letters of the University of Zilina, 4(3), 41-44. doi: 10.26552/com.C.2002.3.41-44
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    References

    1. MAJUMDAR, A. J., LAWS, V.: 1991. Glass Fibre Reinforced Cement. BSP, Oxford.
    2. DRCHALOVÁ, J, ČERNÝ, R, HAVRDA, J.: 2000. The Effect of Anisotropy of Building Materials on the Moisture Transfer. Acta Polytechnica, Vol. 40, pp. 32-35.

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