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Limestone porosity determines the protective effect of a biogenic carbonate surface treatment

Willem De Muynck (UGent) , Stijn Leuridan (UGent) , Nele De Belie (UGent) and Willy Verstraete (UGent)
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Abstract
Microbially induced carbonate precipitation has been explored by several researchers for the protection and consolidation of ornamental limestone, a process known as biodeposition. The influences of microbial aspects and chemical parameters on the efficiency of this kind of treatment have been widely documented. This is the first paper in which the influence of the type of stone on the treatment efficiency is reported. In this study, an ureolytic biodeposition treatment was applied on four different limestones. Durability of treated stones was assessed by means of transport and degradation processes. A higher weight increase due to carbonate precipitation was observed for stones with higher porosity. The presence of a layer of biogenic carbonate crystals resulted in a decreased rate of water absorption, the effect being more pronounced for the more porous stones. For the most porous stone, i.e. Savonnières, the biodepostion treatment resulted in a decrease of the sorptivity by a factor 17. The biogenic carbonate exerted a consolidating effect on all type of stones. For prisms of 40 mm × 20 mm × 10 mm, the biodeposition treatment resulted in a 50 % lower weight loss upon sonication compared to untreated samples. From this research, it is clear that the porosity, and more specific, pore size distribution has a major influence on the effectiveness of a biodeposition treatment. Pore size governs bacterial adsorption, and hence, the amount of carbonate that can be precipitated. From this study, it follows that biodepostion is less effective on microporous stones such as Massangis.
Keywords
bacteria, conservation, Biomineralization, ageing tests, MICP, stone

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Citation

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MLA
De Muynck, Willem, et al. “Limestone Porosity Determines the Protective Effect of a Biogenic Carbonate Surface Treatment.” 12th International Conference on Durability of Building Materials and Components, Proceedings, edited by Vasco Peixoto de Freitas et al., vol. 2, FEUP, 2011, pp. 881–88.
APA
De Muynck, W., Leuridan, S., De Belie, N., & Verstraete, W. (2011). Limestone porosity determines the protective effect of a biogenic carbonate surface treatment. In V. Peixoto de Freitas, H. Corvacho, & M. Lacasse (Eds.), 12th international conference on durability of building materials and components, Proceedings (Vol. 2, pp. 881–888). Porto, Portugal: FEUP.
Chicago author-date
De Muynck, Willem, Stijn Leuridan, Nele De Belie, and Willy Verstraete. 2011. “Limestone Porosity Determines the Protective Effect of a Biogenic Carbonate Surface Treatment.” In 12th International Conference on Durability of Building Materials and Components, Proceedings, edited by Vasco Peixoto de Freitas, Helena Corvacho, and Michael Lacasse, 2:881–88. Porto, Portugal: FEUP.
Chicago author-date (all authors)
De Muynck, Willem, Stijn Leuridan, Nele De Belie, and Willy Verstraete. 2011. “Limestone Porosity Determines the Protective Effect of a Biogenic Carbonate Surface Treatment.” In 12th International Conference on Durability of Building Materials and Components, Proceedings, ed by. Vasco Peixoto de Freitas, Helena Corvacho, and Michael Lacasse, 2:881–888. Porto, Portugal: FEUP.
Vancouver
1.
De Muynck W, Leuridan S, De Belie N, Verstraete W. Limestone porosity determines the protective effect of a biogenic carbonate surface treatment. In: Peixoto de Freitas V, Corvacho H, Lacasse M, editors. 12th international conference on durability of building materials and components, Proceedings. Porto, Portugal: FEUP; 2011. p. 881–8.
IEEE
[1]
W. De Muynck, S. Leuridan, N. De Belie, and W. Verstraete, “Limestone porosity determines the protective effect of a biogenic carbonate surface treatment,” in 12th international conference on durability of building materials and components, Proceedings, Porto, Portugal, 2011, vol. 2, pp. 881–888.
@inproceedings{2914603,
  abstract     = {{Microbially induced carbonate precipitation has been explored by several researchers for the protection and consolidation of ornamental limestone, a process known as biodeposition. The influences of microbial aspects and chemical parameters on the efficiency of this kind of treatment have been widely documented. This is the first paper in which the influence of the type of stone on the treatment efficiency is reported. In this study, an ureolytic biodeposition treatment was applied on four different limestones. Durability of treated stones was assessed by means of transport and degradation processes. A higher weight increase due to carbonate precipitation was observed for stones with higher porosity. The presence of a layer of biogenic carbonate crystals resulted in a decreased rate of water absorption, the effect being more pronounced for the more porous stones. For
the most porous stone, i.e. Savonnières, the biodepostion treatment resulted in a decrease of the
sorptivity by a factor 17. The biogenic carbonate exerted a consolidating effect on all type of stones. For prisms of 40 mm × 20 mm × 10 mm, the biodeposition treatment resulted in a 50 % lower weight loss upon sonication compared to untreated samples. From this research, it is clear that the porosity, and more specific, pore size distribution has a major influence on the effectiveness of a biodeposition treatment. Pore size governs bacterial adsorption, and hence, the amount of carbonate that can be precipitated. From this study, it follows that biodepostion is less effective on microporous stones such as Massangis.}},
  author       = {{De Muynck, Willem and Leuridan, Stijn and De Belie, Nele and Verstraete, Willy}},
  booktitle    = {{12th international conference on durability of building materials and components, Proceedings}},
  editor       = {{Peixoto de Freitas, Vasco and Corvacho, Helena and Lacasse, Michael}},
  isbn         = {{9789727521326}},
  keywords     = {{bacteria,conservation,Biomineralization,ageing tests,MICP,stone}},
  language     = {{eng}},
  location     = {{Porto, Portugal}},
  pages        = {{881--888}},
  publisher    = {{FEUP}},
  title        = {{Limestone porosity determines the protective effect of a biogenic carbonate surface treatment}},
  volume       = {{2}},
  year         = {{2011}},
}