| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Heath, Andrew
University of Bath
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (27/27 displayed)
- 2024Improving the pozzolanic reactivity of clay, marl and obsidian through mechanochemical or thermal activationcitations
- 2023Insights into the piezoceramic electromechanical impedance response for monitoring cement mortars during water saturation curingcitations
- 2022The impact of mechanochemical activation on the physicochemical properties and pozzolanic reactivity of kaolinite, muscovite and montmorillonitecitations
- 2022Air-entraining admixtures as a protection method for bacterial spores in self-healing cementitious composites:Healing evaluation of early and later-age crackscitations
- 2022Effect of fibre loading on the microstructural, electrical, and mechanical properties of carbon fibre incorporated smart cement-based compositescitations
- 2022Air-entraining admixtures as a protection method for bacterial spores in self-healing cementitious compositescitations
- 2020Compressive Strength of Novel Alkali-Activated Stabilized Earth Materials Incorporating Solid Wastescitations
- 2018Effect of recycled geopolymer concrete aggregate on strength development and consistence of Portland cement concretes
- 2018Concretes incorporating recycled geopolymer aggregate - Implications and properties correlations
- 2018Chemical aspects related to using recycled geopolymers as aggregatescitations
- 2017Alkaliphilic Bacillus species show potential application in concrete crack repair by virtue of rapid spore production and germination then extracellular calcite formationcitations
- 2016Investigation of the Recycling of Geopolymer Cement wastes as Fine Aggregates in Mortar Mixes
- 2016Chemical aspects related to using recycled geopolymers as an aggregate
- 2016Recycling of fly ash-slag Geopolymer binder in mortar mixes
- 2015The environmental credentials of hydraulic lime-pozzolan concretescitations
- 2015Structural and durability properties of hydraulic lime-pozzolan concretescitations
- 2015The environmental credentials of lime-pozzolan concretescitations
- 2014Numerical analysis of triplet shear test on brickwork masonrycitations
- 2013Laboratory scale testing of extruded earth masonry unitscitations
- 2013The potential for using geopolymer concrete in the UKcitations
- 2012The feasibility and potential of modern hydraulic lime concretes
- 2012Drystone retaining walls: ductile engineering structures with tensile strengthcitations
- 2009The compressive strength of modern earth masonry
- 2009The compressive strength of modern earth masonry
- 2009Compressive strength of extruded unfired clay masonry unitscitations
- 2001Quantifying Longitudinal, Corner and Transverse Cracking in Jointed Concrete Pavements
- 2000Top-down cracking of rigid pavements constructed with fast-setting hydraulic cement concrete
Places of action
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article
Alkaliphilic Bacillus species show potential application in concrete crack repair by virtue of rapid spore production and germination then extracellular calcite formation
Abstract
Aims: Characterisation of alkaliphilic Bacillus species for spore production and germination and calcite formation as a prelude to investigate their potential in micro-crack remediation in concrete.<br/>Methods and Results: Conditions, extent and timing of endospore production was determined by dark field light microscopy; germination induction and kinetics was assessed by combining reduction in optical density with formation of refractile bodies by phase contrast microscopy. B. pseudofirmus was selected from several species as the most suitable isolate. Levels and timing of calcium carbonate precipitated in vitro by B. pseudofirmus was evaluated by atomic absorption spectroscopy and structural identity confirmed as calcite and aragonite by Raman spectroscopy and FITR. The isolate produced copious spores that germinated rapidly in the presence of germinants L-alanine, inosine and NaCl. Bacterial cells produced CaCO3 crystals in micro-cracks and the resulting occlusion markedly restricted water ingress.<br/>Conclusions: By virtue of rapid spore production and germination, calcium carbonate formation in vitro and in situ, leading to sealing of micro-cracks, B. pseudofirmus shows clear potential for remediation of concrete on a commercial scale. <br/>Significance and Impact of Study: Microbial sealing of micro-cracks should become a practicable and sustainable means of increasing concrete durability.