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Durability improvement of ancient bricks by cementation of porous media

AuthorsLópez-Arce, Paula ; Benavente, David; García-Guinea, Javier
Issue Date8-Jun-2005
PublisherAmerican Ceramic Society
John Wiley & Sons
CitationJournal of American Ceramic Society 88(9): 2564-2572 (2005)
AbstractThe physicomechanical properties of historic bricks in Toledo (Spain) that have undergone a time-dependent self-healing by natural weathering processes have been improved by porous infill with gypsum, ettringite, and, mainly, calcite. Both these bricks and their experimental replica bricks, made from the original calcareous clays fired at the appropriate historical temperatures (700°–900°C), have been analyzed by X-ray diffraction, optical and scanning electron microscopy, mercury intrusion porosimetry, and ultrasound velocities to compare pore structure and strength evolution by mineral cementation. The resultant microstructure and mineral fillings depend on the brick calcareous composition and firing temperature, the brick location environment, burial, indoor or outdoor walls, the lime-based joint mortars and coat plasters, and infiltration waters.
Description9 pages (final publisher version), 28 pages, 6 figures (attached post-print version).-- This work is based in part on the thesis submitted by P. López-Arce for the Ph.D. in Geology, Complutense University of Madrid, Spain, 2004.
Publisher version (URL)http://dx.doi.org/10.1111/j.1551-2916.2005.00466.x
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