Characteristics of brick used as aggregate in historic brick-lime mortars and plasters

Mortars and plasters composed of a mixture of brick powder and lime have been used since ancient times due to their hydraulic properties. In this study, raw material compositions, basic physical, mineralogical, microstructural and hydraulic properties of some historic Ottoman Bath brick-lime mortars...

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Bibliographic Details
Published in:Cement and concrete research 2006-06, Vol.36 (6), p.1115-1122
Main Authors: Böke, Hasan, Akkurt, Sedat, İpekoğlu, Başak, Uğurlu, Elif
Format: Article
Language:English
Subjects:
Applied sciences
Buildings. Public works
Ca(OH) 2
Calcium–Silicate–Hydrate (C–S–H)
Concretes. Mortars. Grouts
Exact sciences and technology
General (composition, classification, performance, standards, patents, etc.)
Historic brick-lime plaster
Lime. Gypsum plaster. Plaster elements
Materials
Mortar
Pozzolan
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Summary:Mortars and plasters composed of a mixture of brick powder and lime have been used since ancient times due to their hydraulic properties. In this study, raw material compositions, basic physical, mineralogical, microstructural and hydraulic properties of some historic Ottoman Bath brick-lime mortars and plasters were determined by XRD, SEM-EDS, AFM, TGA and chemical analyses. The mineralogical and chemical compositions, microstructures, morphologies and pozzolanicities of the brick powders and fragments used as aggregates in the mortars and plasters were examined to find out the relationship between hydraulic properties of the mortars and the bricks. The characteristics of bricks used in the bath domes were also determined to investigate whether the brick aggregates used in mortar and plasters were prepared from these bricks. The results indicated that the mortars and plasters were hydraulic owing to the presence of crushed brick powders that have good pozzolanicity. The brick powders had high pozzolanicity because they contained high amounts of calcium-poor clay minerals in their raw materials that were fired at low temperatures. On the other hand, bricks used in the domes had poor pozzolanicity with different mineralogical and chemical compositions from bricks used in mortars and plasters. Based on the results of the analysis, it was thought that the bricks manufactured with high amounts of clays were consciously chosen in the preparation of hydraulic mortars and plasters.
ISSN:0008-8846
1873-3948
DOI:10.1016/j.cemconres.2006.03.011