Study of Architectural Ceramics of the Qal’a of Bani Hammad

  • Abla Brahmi Materials, Processes and Environment Research Unit (MPE-RU), city Frantz Fanon 35000 Boumerdes, Algeria
  • Messaoud Hamiane Materials, Processes and Environment Research Unit (MPE-RU), city Frantz Fanon 35000 Boumerdes, Algeria
Keywords: The Qal’a of Bani Hammad, physicochemical characterization of ceramics, optical absorption spectrometry, X-ray fluorescence, X-ray diffraction

Abstract

In order to define with precision, the physicochemical characteristics of the architectural ceramic exhumed from the Qal’a of Bani Hammad’s site (inscribed on the UNESCO’s World Heritage List in 1980), our study was conducted on a set of ceramics. The first analyses were focused on the color of the glazes, by optical absorption spectrophotometry (also called optical absorbance spectroscopy), on the texture by X-Ray diffraction, and on the elemental composition of the various constituent stages of these glazes and their terra cotta, by scanning electron microscopy and X-Ray fluorescence. Indeed, the study combining optical absorbance spectroscopy and X-Ray fluorescence enabled us to determine the origin of the monochromic green coloring of the glazes in some samples. This coloring can be attributed to the presence of the Cu2 chemical element; but these glazes darkened due to the high iron content they contain. This could be explained by an intentional addition of iron, in tin-opacified leaded glazes, baked in an oxidizing atmosphere and put on a limestone-rich marlacious paste.

The chemical and mineralogical analyses of all shards show that their paste is calcareous. This dataset will be exploitable for re-creation experiments. It also represents a first exploitable referential system, for potential comparisons with other samples belonging to other Algerian sites and different periods of time.

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Published
2018-06-04
How to Cite
Brahmi, A., & Hamiane, M. (2018). Study of Architectural Ceramics of the Qal’a of Bani Hammad. Journal of Building Materials and Structures, 5(1), 164-173. https://doi.org/10.34118/jbms.v5i1.55
Section
Original Articles