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HomeDefect and Diffusion ForumDefect and Diffusion Forum Vol. 366Comparative Measurements of the Thermal Properties...

Comparative Measurements of the Thermal Properties of Solid Materials on a New Device and Using a New Non-Stationary Method

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Abstract:

The aim of the publication is the comparative measurements of changes in temperature of the significant material coefficient - thermal conductivity for newly developed construction materials (lightweight concrete). The aim is met by using a newly proposed method and a newly developed device by the approximation modelling of the temperature dependence of the thermal conductivity coefficient of the new composites and also the interpretation of measurement results in the context of optimally desired characteristics of thermal insulation concrete. Construction materials for residential buildings should have good thermal insulation properties, i.e. relatively low coefficients of thermal conductivity. With regard to the relatively most important property of concrete – strength, however, the reduction in thermal conductivity of concrete is limited. Thermal conductivity of concrete can be reduced very effectively by increasing its porosity; on the other hand, by increasing the porosity, the strength of concrete is significantly reduced. The publication, therefore, compares the results of temperature dependences of thermal conductivity for three newly designed concretes, namely in the context of their compressive strength.

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Periodical:

Defect and Diffusion Forum (Volume 366)

Pages:

63-72

DOI:

https://doi.org/10.4028/www.scientific.net/DDF.366.63

Citation:

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Online since:

April 2016

Authors:

Milena Kušnerová, Lukáš Gola, Jan Valíček, Vojtěch Václavík, Marta Harničárová, Iveta Pandová, Pavol Koštial

Keywords:

Approximations, Comparative Measurements, Compressive Strength, Thermal Conductivity, Thermal Insulation Concretes

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