| 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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Barbosa, Ricardo Antonio
Technical University of Denmark
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (11/11 displayed)
- 2024Towards Extending the Range of Supplementary Cementitious Materials in ASR Regulations
- 2024Laboratory and field investigations of alkali-silica reaction prevention by supplementary cementitious materials:Influence of the free alkali loadingcitations
- 2023Pore solution alkalinity of cement paste as determined by Cold Water Extractioncitations
- 2023Pore solution alkalinity of cement paste as determined by Cold Water Extractioncitations
- 2022Predicting the effect of SCMs on ASR in the accelerated mortar bar test with artificial neural networks
- 2022Predicting the effect of SCMs on ASR in the accelerated mortar bar test with artificial neural networks
- 2022Controlling ASR in concrete by surface treatment - Field performance investigation
- 2017Influence of alkali-silica reaction on the physical, mechanical, and structural behaviour of reinforced concrete
- 2015Severe ASR damaged concrete bridges
- 2014Novel shear capacity testing of ASR damaged full scale concrete bridgecitations
- 2014Alkali-Silica Reaction in Reinforced Concrete Structures, Part II
Places of action
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article
Pore solution alkalinity of cement paste as determined by Cold Water Extraction
Abstract
Cold Water Extraction (CWE) is a technique used to extract the pore solution of cementitious materials and to study its alkalinity. CWE can be used on paste, mortar or concrete, and requires only standard laboratory equipment. The method is not yet standardised, so several parameters must be arbitrarily selected when conducting the test. <br/>This work investigated the influence of four parameters on the calculated alkali metal concentrations in the pore solution: the method for determining the amount of pore solution (oven-drying at 40 and 105 °C, desiccator with silica gel and solvent exchange), the size fraction of the powdered material, the leaching duration and the liquid-to-solid ratio. A comparison with values obtained by Pore Water Extraction (PWE) on two cement types emphasises and quantifies the crucial impact of the amount of pore solution on CWE results. The results suggest that some bound alkali metals may be released during CWE. A mechanism is proposed, and recommendations are made to limit any effect of this on CWE results.