caa a22 4500 463190297 CHVBK 20180406164906.0 cr unu---uuuuu 170326e20071101xx s 000 0 eng 10.1007/s10973-006-7944-0 doi (NATIONALLICENCE)springer-10.1007/s10973-006-7944-0 Effect of thermal decomposition processes on the thermal properties of carbon fiber reinforced cement composites in high-temperature range [Elektronische Daten] [R. Černý, Jitka Němečková, Pavla Rovnaníková, P. Bayer] Thermal conductivity, specific heat capacity, thermal diffusivity and linear thermal expansion coefficient of two types of carbon fiber reinforced cement composites are measured in the temperature range up to 800°C. Thermal conductivity and thermal diffusivity are also determined for the specimens exposed to thermal load up to 800°C before the measurement. Differential thermal analysis (DTA), mercury intrusion porosimetry (MIP), scanning electron microscopy (SEM) and X-ray diffraction analysis (XRD) are utilized for the assessment of thermal decomposition processes taking place in the high temperature range under consideration. The high temperature thermal properties of the studied materials are found to be positively affected by the application of the high alumina cement and in the case of the Portland cement based composite also by using the autoclaving procedure in the production process. Also, the randomly distributed carbon fibers that can reduce the damage of the pore structure by the thermal decomposition processes are identified as a positive factor in this respect. A comparison of thermal conductivity vs. temperature curves obtained for the specimens pre-heated to different temperatures is found to be a useful tool in the identification of major dynamic effects in the specimens due to the thermal decomposition reactions. The results are in a good agreement with the DTA, MIP, SEM and XRD analyses. The character of the thermal conductivity measurements that in fact includes the effects of convection and radiation into the thermal conductivity coefficient can be beneficial for a simple assessment of the influence of the fire on a dividing structure. Springer Science+Business Media, LLC., 2007 carbon fiber reinforced cement composites nationallicence high temperatures nationallicence linear thermal expansion coefficient nationallicence specific heat capacity nationallicence thermal conductivity nationallicence thermal diffusivity nationallicence Černý R. Department of Mechanics, Faculty of Civil Engineering, Czech Technical University, Thákurova 7, 166 29, Prague 6, Czech Republic aut Němečková Jitka Department of Mechanics, Faculty of Civil Engineering, Czech Technical University, Thákurova 7, 166 29, Prague 6, Czech Republic aut Rovnaníková Pavla Institute of Chemistry, Faculty of Civil Engineering, Brno University of Technology, Žižkova 17, 662 37, Brno, Czech Republic aut Bayer P. Institute of Chemistry, Faculty of Civil Engineering, Brno University of Technology, Žižkova 17, 662 37, Brno, Czech Republic aut Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 90/2(2007-11-01), 475-488 1388-6150 90:2<475 2007 90 10973 https://doi.org/10.1007/s10973-006-7944-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10973-006-7944-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Černý R. Department of Mechanics, Faculty of Civil Engineering, Czech Technical University, Thákurova 7, 166 29, Prague 6, Czech Republic aut NATIONALLICENCE 700 1- Němečková Jitka Department of Mechanics, Faculty of Civil Engineering, Czech Technical University, Thákurova 7, 166 29, Prague 6, Czech Republic aut NATIONALLICENCE 700 1- Rovnaníková Pavla Institute of Chemistry, Faculty of Civil Engineering, Brno University of Technology, Žižkova 17, 662 37, Brno, Czech Republic aut NATIONALLICENCE 700 1- Bayer P. Institute of Chemistry, Faculty of Civil Engineering, Brno University of Technology, Žižkova 17, 662 37, Brno, Czech Republic aut NATIONALLICENCE 773 0- Journal of Thermal Analysis and Calorimetry Springer US; http://www.springer-ny.com 90/2(2007-11-01), 475-488 1388-6150 90:2<475 2007 90 10973 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer