WIT Press


Application Of Effective Media Theory In The Characterization Of The Hygrothermal Performance Of Masonry

Price

Free (open access)

Paper DOI

10.2495/MC110131

Volume

72

Pages

12

Page Range

143 - 154

Published

2011

Size

466 kb

Author(s)

Z. Pavlík, E. Vejmelková, L. Fiala, M. Pavlíková & R. Černý

Abstract

Hygric and thermal properties of several types of materials which are used in reconstructions of historical stone masonry on Czech territory are experimentally measured at first. The obtained data are then subjected to a homogenization procedure, and the effective heat and moisture transport and storage parameters of the typical fragment of masonry are calculated. For the homogenization, a mixing model originally derived for applications in dielectric studies was employed taking into account the theoretical bounds of the investigated material parameters. The obtained data can find use in damage assessment of historical masonry using methods of computational simulations and analysis. Keywords: hygric properties, thermal properties, historical stone masonry, argillite, sandstone, lime-based plaster, homogenization techniques. 1 Introduction The hygrothermal behaviour of climatically exposed components and structures of historical buildings is related to the hygric, thermal, mechanical and other physical and chemical properties of inbuilt materials. Their knowledge represents necessary information for the understanding of the building performance as well as the first step in avoiding damage, degradation or the undue heat loss from the constructions. The damage assessment of historical masonry and other structures due to the negative effects of moisture and temperature can be done effectively by means of mathematical and computational modelling. In this way, the time development of

Keywords

hygric properties, thermal properties, historical stone masonry, argillite, sandstone, lime-based plaster, homogenization techniques