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FROM LAB SCALE TO IN SITU APPLICATIONS – THE ASCENT OF A BIOGENIC CARBONATE BASED SURFACE TREATMENT



Author(s): Muynck, W. D., Boon, N. and De Belie, N.
Paper category: Conference
Book title: XIII International Conference on Durability of Building Materials and Components - XIII DBMC
Editor(s): Marco Quattrone, Vanderley M. John
Print ISBN: none
e-ISBN: 978-2-35158-149-0
Publication year: 2015
Pages: 711-718
Total Pages: 8
Language: English


Abstract: Throughout the last decade, many authors have considered microbially induced carbonate precipitation as a promising technique to overcome shortcomings of conventional surface treatments. Despite high expectations and encouraging results from laboratory tests, biodeposition has hardly been applied in practice. So far, only one bacterial based treatment has been made commercially available. The rather low consolidation performance of this treatment together with its high product and labour costs may account for the limited spread of this technology. This paper presents our efforts to make the biodeposition treatment a highly performing and economically feasible technique and describes the parameters that affect the performance of the treatment. It summarizes the findings from several years of research indicating the advantages of a urea based pathway. By altering the product composition and application procedure we succeeded in optimizing the distribution of the biogenic crystals throughout the stone. The strengthening effect of the biodeposition treatment was evaluated by means of drilling resistance measurements and was compared to that of conventional surface treatments, both being applied under laboratory and in situ conditions. From this study, it is clear that our urea based biodeposition treatment performs well when applied in situ and can be offered at a reasonable price.


Online publication: 2015
Publication Type: full_text
Public price (Euros): 0.00