Article (Scientific journals)
Determination of Moisture Diffusivity During Drying of Mortar Cement: Experimental and Modeling Study
Bennamoun, Lyes; Kahlerras, Loubna; Michel, Frédéric et al.
2013In International Journal of Energy Engineering, 3 (1), p. 1-6
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Keywords :
Thermal energy; Convective drying; Diffusion coefficient
Abstract :
[en] The aim of this study is the experimental characterization of the behaviour of a mortar during convective drying. We focalise on mortar that has a rate water-cement of 0.5. The drying tests are developed in a micro-convective dryer that can use samples weighing from 0 to 8g. The advantage of these experiments is to reproduce the natural conditions that can be found during the treatment of the mortar-atmosphere problems. The response of the drying curve or the drying kinetic depends on the applied drying conditions. So, the temperature of the air varies from 60°C to 130°C, the velocity of the air is changed from 2 m.s-1 to 5 m. s-1and the relative humidity is kept less than 1.7%. The comparison between the experimental results and the proposed analytical solutions of the equation of diffusion represented by Fick’s law, applied for a finite shape, allows determination of the values of the diffusion coefficient. It has a value of 1.71×10-10 m2.s-1 at 60°C, 13.69×10-10 m2.s-1 at 90°C and 16.27×10-10 m2.s-1 at 130°C. Calculation of the activation energy and the D0 constant are also possible.
Disciplines :
Energy
Chemical engineering
Author, co-author :
Bennamoun, Lyes ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Procédés et développement durable
Kahlerras, Loubna ;  Université de Liège - ULiège > Doct. sc. ingé. (chim. appl. - Bologne)
Michel, Frédéric ;  Université de Liège - ULiège > Département Argenco : Secteur GeMMe > Matériaux de construction non métalliques du génie civil
Courard, Luc  ;  Université de Liège - ULiège > Département Argenco : Secteur GeMMe > Matériaux de construction non métalliques du génie civil
Salmon, Thierry ;  Université de Liège - ULiège > Département de chimie appliquée > Département de chimie appliquée
Fraikin, Laurent ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Procédés et développement durable
Belhamri, Azeddine
Léonard, Angélique  ;  Université de Liège - ULiège > Département de chimie appliquée > Génie chimique - Procédés et développement durable
Language :
English
Title :
Determination of Moisture Diffusivity During Drying of Mortar Cement: Experimental and Modeling Study
Publication date :
2013
Journal title :
International Journal of Energy Engineering
ISSN :
2163-1891
eISSN :
2163-1905
Publisher :
Scientific & Academic Publishing, Rosemead, United States
Volume :
3
Issue :
1
Pages :
1-6
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 15 November 2012

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