The effect of firing temperature on the irreversible expansion, water absorption and pore structure of a brick body during freeze-thaw cycles

  • Mikuláš ŠVEDA Faculty of Civil Engineering, Slovak University of Technology
  • Radomir SOKOLÁŘ Brno University of Technology
Keywords: brick body, clay roofing tile, frost resistance, irreversible expansion, water absorption, pore structure

Abstract

The paper deals with the monitoring of brick body in the process of volumetric freezing and thawing. The samples were fired at temperatures of 900, 1000 and 1060°C. Attention is focused on monitoring of the irreversible expansion, water absorption and pore structure of a brick body. We found that in all cases the endpoints take place continuously, where the amount firing temperature plays a crucial role. The greatest influence of freeze/thaw cycles on the change of the pore structure was also observed at the lowest temperature. The change of the pore system during the freeze-thaw cycles occurs in such a way, that the pore volume of small pores further decreases and conversely, the pore volume of large pores increases. The knowledge gained can be used not only in the production of new but also in predicting the remaining durability of older clay roofing tiles.

DOI: http://dx.doi.org/10.5755/j01.ms.19.4.2741

Author Biography

Mikuláš ŠVEDA, Faculty of Civil Engineering, Slovak University of Technology

Department of Materials Engineering

Professor; lecturer

Published
2013-12-11
Section
CONSTRUCTION MATERIALS