Physico-chemical, mineralogical, and technological characterization of stabilized clay bricks for restoration of Kasbah Ait Benhadou- Ouarzazate (south-east of Morocco)
[en] Due to ageing, the unfired brick masonry may detach and fall off, or deteriorate to such an extent that it
becomes necessary to restore them. Such is the case, for instance, of the Ksar of Ait Benhadou in
Ouarzazate, Morocco. Our study aims to provide compatible and sustainable earthen bricks to restore this
monument. Samples were collected from facades that were under conservation/restoration at the time
when sampling was performed.
Clayey soil samples were collected vicinity to the Ksar and analyzed by X-ray diffraction and X-ray fluorescence. A representative sample was stabilized with three aggregates (lime, cement and straw). The
effect of ageing of the stabilized briquettes on shrinkage, water absorption, mechanical and thermal properties, compressive strength and thermal conductivity was studied on stabilized specimens. The samples
consist mainly of clay minerals, calcite and quartz. They are rich in iron, aluminium and potassium. These
samples are sandy with low plasticity (PI = 7%), which is slightly lower than the plasticity value required
by the Moroccan standard for earth constructions. The results showed that the stabilized clayey soils
have suitable properties such as density, porosity, water absorption and high thermal insulation. The best
compressive strength performance is obtained for clay-stabilized samples with a high sand fraction. The
thermal conductivity of clay-stabilized specimens increases as the specimens become denser and more
compact, lime and straw have the opposite effect.
Copyright 2022 Elsevier Ltd. All rights reserved.
Selection and peer-review under responsibility of the scientific committee of the 3rd International Congress on Materials & Structural Stability
Disciplines :
Chemistry
Author, co-author :
Lechheb, Mahdi; Faculty of Sciences and Techniques, Moulay Ismail University, Errachidia, Morocco > Department of Chemistry > Materials Sciences for Energy and Sustainable Development Team > 2021-2022
Elboukili, Ghita; Team of Modeling and Simulation of Mechanical and Energetic, Physical Department, Faculty of Sciences, Mohammed V University, Rabat, Morocco
azrour, mohamed; Materials Sciences for Energy and Sustainable Development Team, Department of Chemistry, Faculty of Sciences and Techniques, Moulay Ismail University, Errachidia, Morocco
Abdelilah, Lahmar; Laboratoire de Physique de la matière Condensée (LPMC - EA2081) Université de Picardie Jules Verne, Amiens, France
El Ouahabi, Meriam ; Université de Liège - ULiège > Département de géologie > Argiles, géochimie et environnements sédimentaires
el khadir, gharibi; Laboratory of Applied Chemistry and Environment Team of Mineral Solid Chemistry, Faculty of Sciences, Mohammed First University, Oujda 60000, Morocco
Language :
English
Title :
Physico-chemical, mineralogical, and technological characterization of stabilized clay bricks for restoration of Kasbah Ait Benhadou- Ouarzazate (south-east of Morocco)
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