Alganite-bacillus subtilis based repair materials for sealing cracks in concrete

Author(s): Masahiko Ide, Keiyuu Kawaai, Isao Ujike
Paper category: Proceedings
Book title: SynerCrete’18: Interdisciplinary Approaches for Cement-based Materials and Structural Concrete: Synergizing Expertise and Bridging Scales of Space and Time Vol. 1 & 2
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN: 978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 487-492
Total Pages: 6
Language : English

Abstract: Recently, repair materials associated with microbial induced calcium carbonate precipitation (MICP) have been intensively studied in the field of self-healing concrete. We have proposed a liquid-based repair system comprising microorganism and organic carbon sources mixed with alkali buffering solution. This study examined crack repair methods using alginate gel films (1.0-1.5 wt%) mixed with healing agents under wet and dry actions. The healing agents consist of bacillus subtilis as aerobic microorganism and glucose as an organic carbon source, thereby producing insoluble calcium carbonate precipitation in the gel films in the presence of calcium ions. The results showed that water permeability was significantly lowered for the cases of alginate gel films with MICP, thus suggesting that the precipitates could enhance the resistance against water pressure of the gel films formed on the cracked surface.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00