| 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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Walkley, Brant
University of Sheffield
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (21/21 displayed)
- 2024Characterisation of calcined waste clays from kaolinite extraction in alkali-activated GGBFS blendscitations
- 2024Basic oxygen furnace (BOF) slag as an additive in sodium carbonate-activated slag cementscitations
- 2023Carbonation Rate of Alkali-Activated Concretes
- 2023RILEM TC 281-CCC Working Group 6
- 2023Evaluation of copper slag and stainless steel slag as replacements for blast furnace slag in binary and ternary alkali-activated cementscitations
- 2023Evaluation of copper slag and stainless steel slag as replacements for blast furnace slag in binary and ternary alkali-activated cementscitations
- 2023Characterisation of alkali-activated stainless steel slag and blast-furnace slag cementscitations
- 2023Characterisation of alkali-activated stainless steel slag and blast-furnace slag cementscitations
- 2022Encapsulation of iodine-loaded metallated silica materials by a geopolymer matrixcitations
- 2022The influence of curing temperature on the strength and phase assemblage of hybrid cements based on GGBFS/FA blendscitations
- 2022Carbonation rate of alkali-activated concretes and high-volume SCM concretescitations
- 2022Report of RILEM TC 267-TRM phase 2: optimization and testing of the robustness of the R3 reactivity tests for supplementary cementitious materialscitations
- 2022Report of RILEM TC 267-TRM phase 2: optimization and testing of the robustness of the R3 reactivity tests for supplementary cementitious materialscitations
- 2021Synthesis of Ca1-xCexZrTi2-2xAl2xO7 zirconolite ceramics for plutonium dispositioncitations
- 2021Synthesis of Ca 1-x Ce x ZrTi 2-2x Al 2x O 7 zirconolite ceramics for plutonium dispositioncitations
- 2021Activator Anion Influences the Nanostructure of Alkali-Activated Slag Cementscitations
- 2020The role of zinc in metakaolin-based geopolymerscitations
- 2020Incorporation of strontium and calcium in geopolymer gelscitations
- 2018Slag and Activator Chemistry Control the Reaction Kinetics of Sodium Metasilicate-Activated Slag Cementscitations
- 2018Reactivity tests for supplementary cementitious materials RILEM TC 267-TRM phase 1citations
- 2018Reactivity tests for supplementary cementitious materials: RILEM TC 267-TRM phase 1citations
Places of action
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article
The influence of curing temperature on the strength and phase assemblage of hybrid cements based on GGBFS/FA blends
Abstract
Hybrid cements are composites made of Portland cement or Portland clinker and one or more supplementary cementitious materials like slag, fly ash or metakaolin, activated with an alkali salt. To date, their hydration mechanism and the phase formation at various temperatures is insufficiently understood, partly due to the large variability of the raw materials used. In the present study, three hybrid cements based on ground granulated blast furnace slag, fly ash, Portland clinker and sodium sulfate, and an alkali-activated slag/fly ash blend were cured at 10 and 21.5°C, and subsequently analyzed by XRD, 27Al MAS NMR, and TGA. The compressive strength of the hybrid cements was higher by up to 27% after 91-day curing at 10°C, compared to curing at 21.5°C. The experimental results as well as thermodynamic modeling indicate that the differences in compressive strength were related to a different phase assemblage, mainly differing amounts of strätlingite and C-N-A-S-H, and the associated differences of the volume of hydration products. While the strätlingite was amorphous to X-rays, it could be identified by 27Al MAS NMR spectroscopy, TGA and thermodynamic modeling. The microstructural properties of the hybrid cements and the alkali-activated slag/fly ash blend as well as the compatibility between thermodynamic modeling results and experimental data as a function of curing temperature and time are discussed.