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- aggregation classification "C1".
- aggregation creator person.
- aggregation creator person.
- aggregation creator person.
- aggregation creator person.
- aggregation date "2011".
- aggregation format "application/pdf".
- aggregation hasFormat 2914603.bibtex.
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- aggregation hasFormat 2914603.didl.
- aggregation hasFormat 2914603.doc.
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- aggregation isPartOf urn:isbn:9789727521326.
- aggregation language "eng".
- aggregation publisher "FEUP".
- aggregation rights "I have transferred the copyright for this publication to the publisher".
- aggregation subject "Technology and Engineering".
- aggregation title "Limestone porosity determines the protective effect of a biogenic carbonate surface treatment".
- aggregation 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.".
- aggregation authorList BK296077.
- aggregation endPage "888".
- aggregation startPage "881".
- aggregation volume "2".
- aggregation aggregates 3148596.
- aggregation isDescribedBy 2914603.
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