Detail publikačního výsledku

Thermal and hygric properties of Portland cement mortar after high-temperature exposure combined with compressive stress

ČERNÝ, R.; TOTOVÁ, M.; PODĚBRADSKÁ, J.; TOMAN, J.; DRCHALOVÁ, J.

Originální název

Thermal and hygric properties of Portland cement mortar after high-temperature exposure combined with compressive stress

Anglický název

Thermal and hygric properties of Portland cement mortar after high-temperature exposure combined with compressive stress

Druh

Článek recenzovaný mimo WoS a Scopus

Originální abstrakt

Thermal conductivity , water vapor permeability , and liquid moisture diffusivity of cement mortar are measured on specimens subjected to four types of pre-treatment , namely, mechanically loaded to 90% of compressive strength, thermally loaded by subjecting to a temperature of 800 C for 2h, and loaded both mechanically and thermally. The values of ë and e are found to depend very significantly on the loading mode. The maximum differences observed compared to the unloaded samples are almost one order of magnitude for ë and as much as three orders of magnitude for e. In contrast, the values of ä are found to increase by only about 40% compared to the basic unloaded material, it is proposed that the observed large differences in ë and e are due to the formation of cracks and the increase of total pore volume, which were shown by visual analysis and mercury porosimetry.

Anglický abstrakt

Thermal conductivity , water vapor permeability , and liquid moisture diffusivity of cement mortar are measured on specimens subjected to four types of pre-treatment , namely, mechanically loaded to 90% of compressive strength, thermally loaded by subjecting to a temperature of 800 C for 2h, and loaded both mechanically and thermally. The values of ë and e are found to depend very significantly on the loading mode. The maximum differences observed compared to the unloaded samples are almost one order of magnitude for ë and as much as three orders of magnitude for e. In contrast, the values of ä are found to increase by only about 40% compared to the basic unloaded material, it is proposed that the observed large differences in ë and e are due to the formation of cracks and the increase of total pore volume, which were shown by visual analysis and mercury porosimetry.

Klíčová slova v angličtině

Transport properties, Hygric properties, Mercury porosimetry, Thermal analysis

Autoři

ČERNÝ, R.; TOTOVÁ, M.; PODĚBRADSKÁ, J.; TOMAN, J.; DRCHALOVÁ, J.

Vydáno

01.01.2003

ISSN

0008-8846

Periodikum

CEMENT AND CONCRETE RESEARCH

Číslo

33

Stát

Spojené království Velké Británie a Severního Irska

Strany od

1347

Strany počet

9

BibTex

@article{BUT41849,
  author="Robert {Černý} and Michaela {Totová} and Jitka {Poděbradská} and Jan {Toman} and Jaroslava {Drchalová} and Pavla {Rovnaníková}",
  title="Thermal and hygric properties of Portland cement mortar after high-temperature exposure combined with compressive stress",
  journal="CEMENT AND CONCRETE RESEARCH",
  year="2003",
  number="33",
  pages="9",
  issn="0008-8846"
}