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The influence of lithology on the mechanical strength and porosity of terra-cotta, the case study of Marrakech region (Morocco).
El Boudour El Idrissi, Hicham; Daoudi, Lahcen; Collin, Frédéric et al.
201513ème Colloque du Groupe Français des Argiles
 

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Abstract :
[en] The ceramic pastes in Marrakech region are prepared on the base of six types of raw materials of different lithologies. Various products are manufactured. The production consists of cooking utensils (based on schist, colluviums, quartzose sand and silt), decoration products (based on argillite, washing residues and soil), vases and gourds products (based on schist and soil), tiles (based on silt decantation) and traditional dishes (based on soil and argillite). In this study we elaborate bricks from the different raw material and we evaluate some of their physical properties after firing at 1050°C. In particular we measure the porosity to water and the mechanical strength of all the fired bricks. The aim is to compare the final product quality according to the origin (lithology) of the clayey raw material of the ceramic pastes. Based on our experiments, the bricks of the lower compressive strength (CS) and of the lower flexural strength (FS) are those based on sand (CS = 39 MPa; FS = 7 MPa), on silt decantation (CS = 25 to 39 MPa; FS = 10 to 18 MPa), and on schist and colluviums (CS = 20 to 51 MPa; FS = 6 to 17 MPa). Those of the highest values are based on argillites (CS = 33 to 102 MPa; FS = 13 to 28 MPa). The other pastes are characterized by intermediate values. The porosity ranges between 5 to 27%. The bricks based on silt decantation have the greatest values (20 to 27%), whereas those based on argillite have the lower values (5 to 10%). Those physical properties are, in most cases, in agreement with the requested values of the bricks industry. We conclude that such raw materials have high perspective to manufacture structural products of high performance in mechanical strength and thermal insulation.
Disciplines :
Earth sciences & physical geography
Author, co-author :
El Boudour El Idrissi, Hicham ;  Université de Liège - ULiège > Doct. sc. (géologie - Bologne)
Daoudi, Lahcen;  Faculté des Sciences et Techniques de Marrakech > Géologie > Laboratoire de Géosciences et Environnement
Collin, Frédéric  ;  Université de Liège > Département ArGEnCo > Géotechnique
Fagel, Nathalie  ;  Université de Liège > Département de géologie > Argiles, géochimie et environnements sédimentaires
Language :
English
Title :
The influence of lithology on the mechanical strength and porosity of terra-cotta, the case study of Marrakech region (Morocco).
Publication date :
19 May 2015
Event name :
13ème Colloque du Groupe Français des Argiles
Event place :
Clermont-Ferrand, France
Event date :
du 19 Mai 2015 au 21 Mai 2015
Audience :
International
Available on ORBi :
since 24 May 2015

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