Application of the Lichtenecker’s Mixing Rule in Modeling the Thermal Properties of Autoclaved Aerated Concrete

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F15%3A00229793" target="_blank" >RIV/68407700:21110/15:00229793 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1063/1.4912391" target="_blank" >http://dx.doi.org/10.1063/1.4912391</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/1.4912391" target="_blank" >10.1063/1.4912391</a>

Result language

angličtina

Original language name

Application of the Lichtenecker’s Mixing Rule in Modeling the Thermal Properties of Autoclaved Aerated Concrete

Original language description

Thermal conductivity is an important thermophysical parameter describing heat transport in porous building materials. It is significantly affected by the moisture content; higher water saturation degree leads to the deterioration of thermal insulation capability of building materials. The thermal conductivity is usually determined by repeated measurements for different water saturation levels. However, this procedure is very time consuming. Shortening the time necessary for the determination of thermal conductivity as a function of moisture content can be achieved by an application of convenient mixing formulas. Lichtenecker’s homogenization formula is widely used for its simplicity and the fact that the theoretical Wiener’s bounds can be expressed by choosing the Lichtenecker's coefficient k equal to -1 and 1 k values, laying in close interval [-1, 1], express the geometric transition from parallel to serial connection of heterogeneous material components' layers (matrix, air, water). This article is dealing with the assessment of an optimal coefficient k that identifies precisely the dependence of thermal conductivity of autoclaved aerated concrete (AAC) on moisture content. Data obtained by modeling is compared with measured data by means of RMSE. Under assumption of similar matrix, this approach can lead to an appropriate choice of coefficient k predicting the thermal conductivity dependence on moisture content for a wider group of AACs.

Czech name

—

Czech description

—

Type

D - Article in proceedings

CEP classification

JI - Composite materials

OECD FORD branch

—

Project

<a href="/en/project/GBP105%2F12%2FG059" target="_blank" >GBP105/12/G059: Cumulative time dependent processes in building materials and structures</a><br>

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection

PROCEEDINGS OF THE INTERNATIONAL CONFERENCE ON NUMERICAL ANALYSIS AND APPLIED MATHEMATICS 2014 (ICNAAM-2014)

ISBN

978-0-7354-1287-3

ISSN

0094-243X

e-ISSN

—

Number of pages

4

Pages from-to

—

Publisher name

AIP Conference Proceedings

Place of publication

New York

Event location

Rhodes, Greece

Event date

Sep 22, 2014

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

000355339700080