ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 57, (2) 103 - 107 (2013)


DIFFERENTIAL ANALYSIS OF VOLUMETRIC STRAINS IN POROUS MATERIALS IN TERMS OF WATER FREEZING
 
Rusin Zbigniew, Stelmaszczyk Grzegorz, Swiercz Przemyslaw
 
Kielce University of Technology, Faculty of Civil Engineering and Architecture, Al. Tysiaclecia Panstwa Polskiego 7, 25-314 Kielce, Poland

Keywords: Water freezing, Volumetric strains, Pore characteristics
 

The paper presents the differential analysis of volumetric strain (DAVS). The method allows measurements of volumetric deformations of capillary-porous materials caused by water-ice phase change. The VSE indicator (volumetric strain effect), which under certain conditions can be interpreted as the minimum degree of phase change of water contained in the material pores, is proposed. The test results (DAVS) for three materials with diversified microstructure: clinker brick, calcium-silicate brick and Portland cement mortar were compared with the test results for pore characteristics obtained with the mercury intrusion porosimetry.


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