| 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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Puertas, Francisca
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (14/14 displayed)
- 2022Influence of Accelerating Admixtures on the Reactivity of Synthetic Aluminosilicate Glassescitations
- 2020Gamma spectrometry and LabSOCS-calculated efficiency in the radiological characterisation of quadrangular and cubic specimens of hardened portland cement pastecitations
- 2020Data on natural radionuclide’s activity concentration of cement-based materialscitations
- 2019RILEM TC 247-DTA round robin testcitations
- 2019RILEM TC 247-DTA round robin test: mix design and reproducibility of compressive strength of alkali-activated concretescitations
- 2019Assessment of parameters governing the steel fiber alignment in fresh cement-based compositescitations
- 2018Alkali-activated slag concrete: Fresh and hardened behaviourcitations
- 2018Alkali-activated slag concrete: Fresh and hardened behaviourcitations
- 2009Alkaline chemical activation of urban glass wastes to produce cementituous materials
- 2009Effect of PCs superplasticizers on the rheological properties and hydration process of slag-blended cement pastescitations
- 2009Effect of curing temperatura on hydration process of different cement
- 2009Adsorption of superplasticizer admixtures on alkali-activated slag pastescitations
- 2008Rheology and setting of alkali-activated slag pastes and mortars
- 2002The alkali-silica reaction in alkali-activated granulated slag mortars with reactive aggregatecitations
Places of action
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article
Influence of Accelerating Admixtures on the Reactivity of Synthetic Aluminosilicate Glasses
Abstract
This research aims at gaining a further understanding of the impact of accelerating admixtures on the reactivity of supplementary cementitious materials (SCMs), which are widely used as a clinker replacement in blended cements. This was done on synthetic glasses with controlled composition and structure that mimic two types of real SCMs (slag and calcium-rich fly ash). The effects of DEIPA, TIPA, NaSCN and Na2S2O3 on the glass dissolution, hydration kinetics and reaction products were investigated. The obtained results concluded that the pH of the NaOH solution and the composition of the synthetic glass play a key role on the effect of the admixtures. In 0.1 M NaOH (pH = 13.0), all the studied admixtures inhibited the dissolution of slag-like glasses while they enhanced the dissolution of Ca-rich fly ash-like glasses, being Na2S2O3 the admixture that led to the highest increase of the dissolution rate of the Ca-rich fly ash-type glasses. In 1 M NaOH solutions (pH = 13.8), only the alkali admixtures (NaSCN and Na2S2O3) enhanced the degree of reaction of both glasses. In slag-type glasses pastes mixed with 1 M NaOH, the addition of 2% Na2S2O3 induced the highest increase of their reactivity as inferred by the total heat release and the amount of bound water. This is related to the formation of a high amount of S(II)-AFm, in addition to C-A-S-H, that would increase the aluminium undersaturation of the pore solution and consequently the further dissolution of the glass. ; This research was funded by Consejería de Educación e Investigación (Comunidad de Madrid) for funding the 2016-T1/AMB-1434 project in the frame of “Ayudas de Atracción de Talento Investigador” and CSIC for funding the PIE 202160I023 project. ; Peer reviewed