A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Microbiologically induced calcium carbonate precipitation to repair microcracks remaining after autogenous healing of mortars
HighlightsBiohealing can be efficient on cracks partially autogenously healed.Bacterial effects can be estimated with biotic and abiotic experiments.Biodegradable organic calcium compound is necessary to form calcite in autogenously healed mortar.Inorganic calcium salt improves the robustness if its anion reacts with cement paste.
AbstractCracks remaining after autogenous healing of mortar can be further healed when subjected to a bacterial suspension of Bacillus pseudofirmus if it contains organic calcium compounds. The consumption of organic calcium compounds, such as calcium lactate, by bacteria is providing the necessary calcium to precipitate calcite. The addition of inorganic calcium salts is inefficient to promote the formation of calcite during bacterial growth experiments, but can be efficient during biohealing experiments if the anion of the inorganic calcium salt can react with the cement paste. The addition of both organic and inorganic calcium compounds improves the robustness of the biohealing.
Microbiologically induced calcium carbonate precipitation to repair microcracks remaining after autogenous healing of mortars
HighlightsBiohealing can be efficient on cracks partially autogenously healed.Bacterial effects can be estimated with biotic and abiotic experiments.Biodegradable organic calcium compound is necessary to form calcite in autogenously healed mortar.Inorganic calcium salt improves the robustness if its anion reacts with cement paste.
AbstractCracks remaining after autogenous healing of mortar can be further healed when subjected to a bacterial suspension of Bacillus pseudofirmus if it contains organic calcium compounds. The consumption of organic calcium compounds, such as calcium lactate, by bacteria is providing the necessary calcium to precipitate calcite. The addition of inorganic calcium salts is inefficient to promote the formation of calcite during bacterial growth experiments, but can be efficient during biohealing experiments if the anion of the inorganic calcium salt can react with the cement paste. The addition of both organic and inorganic calcium compounds improves the robustness of the biohealing.
Microbiologically induced calcium carbonate precipitation to repair microcracks remaining after autogenous healing of mortars
Lors, C. (author) / Ducasse-Lapeyrusse, J. (author) / Gagné, R. (author) / Damidot, D. (author)
Construction and Building Materials ; 141 ; 461-469
2017-03-04
9 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2017
| British Library Online Contents | 2017
| British Library Online Contents | 2017
| British Library Online Contents | 2017