| 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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Paine, Kevin A.
University of Bath
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (49/49 displayed)
- 2023Nanomontmorillonite Reinforced Fibre Cements and Nanomontmorillonite-Nanosilica Reinforced Mortarscitations
- 2023Insights into the piezoceramic electromechanical impedance response for monitoring cement mortars during water saturation curingcitations
- 2023Assessing the potential application of bacteria-based self-healing cementitious materials for enhancing durability of wastewater treatment infrastructurecitations
- 2022The Effect of Bacteria on Early Age Strength of CEM I and CEM II Cementitious Compositescitations
- 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
- 2021Investigation of the variability in the components of natural plant fibres subjected to hornification cycles
- 2021Incorporation of bacteria in concrete: the case against MICP as a means for strength improvementcitations
- 2021Using bacteria for early-age strength improvement of concrete
- 2021Waste-Based porous materials as water reservoirs for the internal curing of Concrete. A reviewcitations
- 2021Calcite precipitation by environmental bacteria as a method to improve durability of cementitious materials
- 2020A step by step methodology for building sustainable cementitious matricescitations
- 2019Autogenous self-healing of fibre cements
- 2019In-depth profiling of calcite precipitation by environmental bacteria reveals fundamental mechanistic differences with relevance to self-healing applications
- 2019Sensing of damage and repair of cement mortar using electromechanical impedancecitations
- 2019In-depth profiling of calcite precipitation by environmental bacteria reveals fundamental mechanistic differences with relevance to applicationcitations
- 2019Optimization of low carbon footprint quaternary and quinary (37% fly ash) cementitious nanocomposites with polycarboxylate or aqueous nanosilica particlescitations
- 2019Permeable nanomontmorillonite and fibre reinforced cementitious binderscitations
- 2019ICE Themes Low Carbon Concrete
- 2019From Nanostructural Characterization of Nanoparticles to Performance Assessment of Low Clinker Fibre-Cement Nanohybridscitations
- 2018Pore-structure and microstructural investigation of organomodified/Inorganic nano-montmorillonite cementitious nanocompositescitations
- 2018Lowering cement clinker:citations
- 2018Physical and mechanical properties of plasters incorporating aerogel granules and polypropylene monofilament fibrescitations
- 2018Chemical aspects related to using recycled geopolymers as aggregatescitations
- 2018Polycarboxylate / nanosilica modified quaternary cement formulations - enhancements and limitationscitations
- 2017Construction, demolition and excavation waste management in EU/Greece and its potential use in concrete
- 2017Alkaliphilic Bacillus species show potential application in concrete crack repair by virtue of rapid spore production and germination then extracellular calcite formationcitations
- 2017Inorganic and organomodified nano-montmorillonite dispersions for use as supplementary cementitious materialscitations
- 2016The effects of sol-gel silicates on hydration kinetics and microstructure of Portland cement systems
- 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
- 2015Dispersed Inorganic or Organomodified Montmorillonite Clay Nanoparticles for Blended Portland Cement Pastescitations
- 2015Effects of nanosilica on the calcium silicate hydrates in Portland cement–fly ash systemscitations
- 2015Effect of nanolimestone particles on hydration and flexural strength of Portland limestone cement pastes
- 2015The environmental credentials of hydraulic lime-pozzolan concretescitations
- 2015Structural and durability properties of hydraulic lime-pozzolan concretescitations
- 2015RC structural walls under cyclic loading - Experimental verification of code overestimation of transverse reinforcement reduction potentials
- 2015Sol-Gel Technology as a Seeding Agent for Portland Cement Systems
- 2015A comprehensive review of the models on the nanostructure of calcium silicate hydratescitations
- 2014Strength and deformation characteristics of concrete containing recycled aggregate fines
- 2014The effect of the addition of nanoparticles of silica on the strength and microstructure of blended Portland cement pastes
- 2014Прочность и микроструктура цементного камня c добавками коллоидного SiO2
- 2013Investigations on cementitious composites based on rubber particle waste additionscitations
- 2013The potential for using geopolymer concrete in the UKcitations
- 2012The feasibility and potential of modern hydraulic lime concretes
- 2005Experimental study and modelling of heat evolution of blended cementscitations
- 2005Early-age temperature rises in GGBS concrete - Part 2
- 2005Engineering property and structural design relationships for new and developing concretescitations
Places of action
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document
Using bacteria for early-age strength improvement of concrete
Abstract
Development of early age strength of concrete structures is a crucial parameter in in-situ concrete casting affecting the time and therefore the cost of the construction process. A hindering factor for expanding the use of low-carbon cement is the initial lower strength gain that these materials present in comparison to Portland cement. Nonetheless, employing low-carbon cementitious materials is key for achieving sustainability in the construction industry. An unconventional way for improving the early age strength of concrete is by using bacteria. Several studies have demonstrated the enhancement of strength in concrete by the addition of bacteria cells. These results were attributed to the precipitation of calcite that is induced by the metabolism of the microbes. Here, a different approach to the phenomenon is attempted. In this paper, both live and dead bacteria were added directly in cement mortars in different concentrations. The effect of the bacterial addition on the hydration of cement pastes and the strength properties of mortars at 3, 7 and 28 days were studied. An increase in the strengths of most of the mortars containing bacteria was reported, which was more pronounced for the samples containing dead cells. No additional calcite formation was detected in the samples disproving earlier theories. Furthermore, the hydration rate of the cement was not significantly affected by the addition of the bacteria, either live or dead, suggesting that it is also not a nucleation effect. Microstructural analysis with Scanning Electron Microscopy (SEM) and Thermogravimetric analysis (TGA) were applied for interpreting the strength results and other hypotheses for the strength improvement are suggested. The addition of bacteria appears to be a cheap and environmental-friendly solution for enhancing the properties of low-strength sustainable cement-based materials, thus encouraging their wider use in constructions.