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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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Dyer, Thomas Daniel
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2022Fungal colonization and biomineralization for bioprotection of concretecitations
- 2021Potential of Weathered Blast Furnace Slag for use as an Addition in Concretecitations
- 2021Evaluation of low carbon mortar matrices reinforced with natural fibres
- 2019Pozzolanas and pozzolanic materialscitations
- 2017Influence of cement type on resistance to attack from two carboxylic acidscitations
- 2013Interaction of phenolic brownfield contaminants with hydrating Portland cementcitations
- 2011Characterisation of two chemical compounds formed between hydrated portland cement and benzene-1,2-diol (pyrocatechol)citations
- 2011Hydration chemistry of sewage sludge ash used as a cement componentcitations
- 2009Exposure of Portland cement to multiple trace metal loadingscitations
- 2006Influence of solid solutions on chloride leaching from wasteformscitations
- 2004Hydration reactions of cement combinations containing vitrified incinerator fly ashcitations
- 2004Maximising opportunities for recycling glass
- 2003Use of refuse-derived fuel ash as a cement component in mortar
- 2001Chemical reactions of glass cullet used as a cement componentcitations
Places of action
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article
Exposure of Portland cement to multiple trace metal loadings
Abstract
<p>This paper examines the influence of combinations of lead, zinc and copper on the hydration of cement and the extent to which these metal ions are able to penetrate the surface of a cement paste in contact with solutions containing them. The overall aim of these experiments was to establish the likely outcome of placing fresh concrete in contact with soil contaminated with these metals. Isothermal conduction calorimetry was used to examine the manner in which combinations of lead, zinc and copper in solution affect the kinetics of cement hydration. Zinc and lead ions have the effect of retarding cement hydration. The influence of copper on hydration is much more complex. Penetration of metal ions into fresh cement pastes is generally dependent on the total mass of metal ions in solution. At depths greater than 7 mm from the cement paste surface it was found that metal concentrations remained very low. The results of geochemical modelling support the Authors' proposed mechanism of large-scale precipitation of metals at the surface layer which severely limits further penetration.</p>