Determination of Thermal Conductivity of Silicate Matrix for Applications in Effective Media Theory
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F18%3A00316277" target="_blank" >RIV/68407700:21110/18:00316277 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1007/s10765-017-2347-y" target="_blank" >http://dx.doi.org/10.1007/s10765-017-2347-y</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s10765-017-2347-y" target="_blank" >10.1007/s10765-017-2347-y</a>
Alternative languages
Result language
angličtina
Original language name
Determination of Thermal Conductivity of Silicate Matrix for Applications in Effective Media Theory
Original language description
Silicate materials have an irreplaceable role in the construction industry. They are mainly represented by cement-based- or lime-based materials, such as concrete, cement mortar, or lime plaster, and consist of three phases: the solid matrix and air and water present in the pores. Therefore, their effective thermal conductivity depends on thermal conductivities of the involved phases. Due to the time-consuming experimental determination of the effective thermal conductivity, its calculation by means of homogenization techniques presents a reasonable alternative. In the homogenization theory, both volumetric content and particular property of each phase need to be identified. For porous materials the most problematic part is to accurately identify thermal conductivity of the solid matrix. Due to the complex composition of silicate materials, the thermal conductivity of the matrix can be determined only approximately, based on the knowledge of thermal conductivities of its major compounds. In this paper, the thermal conductivity of silicate matrix is determined using the measurement of a sufficiently large set of experimental data. Cement pastes with different open porosities are prepared, dried, and their effective thermal conductivity is determined using a transient heat-pulse method. The thermal conductivity of the matrix is calculated by means of extrapolation of the effective thermal conductivity vs. porosity functions to zero porosity. Its practical applicability is demonstrated by calculating the effective thermal conductivity of a three-phase silicate material and comparing it with experimental data.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)
Result continuities
Project
<a href="/en/project/GA16-00567S" target="_blank" >GA16-00567S: Alkali-activated aluminosilicate composites with enhanced electrical conductivity</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
International Journal of Thermophysics
ISSN
0195-928X
e-ISSN
1572-9567
Volume of the periodical
39
Issue of the periodical within the volume
2
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
—
UT code for WoS article
000423734800007
EID of the result in the Scopus database
2-s2.0-85039557074