Publication detail

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.

Original Title

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

Type

journal article - other

Language

English

Original Abstract

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.

Key words in English

Transport properties, Hygric properties, Mercury porosimetry, Thermal analysis

Authors

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

Released

1. 1. 2003

ISBN

0008-8846

Periodical

Cement and Concrete Research

Number

33

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1347

Pages to

1355

Pages count

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"
}