Author:
De Muynck Willem,Leuridan Stijn,Van Loo Denis,Verbeken Kim,Cnudde Veerle,De Belie Nele,Verstraete Willy
Abstract
ABSTRACTA ureolytic biodeposition treatment was applied to five types of limestone in order to investigate the effect of pore structure on the protective performance of a biogenic carbonate surface treatment. Protective performance was assessed by means of transport and degradation processes, and the penetration depth of the treatment was visualized by microtomography. Pore size governs bacterial adsorption and hence the location and amount of carbonate precipitated. This study indicated that in macroporous stone, biogenic carbonate formation occurred to a larger extent and at greater depths than in microporous stone. As a consequence, the biodeposition treatment exhibited the greatest protective performance on macroporous stone. While precipitation was limited to the outer surface of microporous stone, biogenic carbonate formation occurred at depths of greater than 2 mm for Savonnières and Euville. For Savonnières, the presence of biogenic carbonate resulted in a 20-fold decreased rate of water absorption, which resulted in increased resistance to sodium sulfate attack and to freezing and thawing. While untreated samples were completely degraded after 15 cycles of salt attack, no damage was observed in biodeposition-treated Savonnières. From this study, it is clear that biodeposition is very effective and more feasible for macroporous stones than for microporous stones.
Publisher
American Society for Microbiology
Subject
Ecology,Applied Microbiology and Biotechnology,Food Science,Biotechnology
Reference32 articles.
1. AdolpheJ. P.
LoubièreJ. F.
ParadasJ.
SoleilhavoupF.. 1990. Procédé de traitement biologique d'une surface artificielle.
European patent 90400G97.0.
2. Practical colour measurement, a primer for the beginner, a reminder for the expert;Berger-Schunn,1994
3. Ca-carbonates precipitation and limestone genesis—the microbiogeologist point of view;Castanier;Sediment. Geol.,1999
4. X-ray micro-CT used for the localization of water repellents and consolidants inside natural building stones;Cnudde;Mater. Charact.,2004
5. Microbial interactions with mineral building materials. Ph.D. dissertation;De Muynck,2009
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