| 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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Nedeljković, Marija
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2023Energy consumption of a laboratory jaw crusher during normal and high strength concrete recyclingcitations
- 2023Pre-demolition concrete waste stream identificationcitations
- 2023Non-destructive screening methodology based on handheld XRF for the classification of concretecitations
- 2021Selectief slopen van betonconstructies
- 2021Use of fine recycled concrete aggregates in concretecitations
- 2021Physical, chemical and mineralogical characterization of Dutch fine recycled concrete aggregatescitations
- 2021Multi-level chemical characterization of dutch fine recycled concrete aggregates: a comparative study
- 2021Influence of sand drying and mixing sequence on the performance of mortars with fine recycled concrete aggregatescitations
- 2019Physical Characterization of Dutch Fine Recycled Concrete Aggregates: A Comparative Studycitations
- 2019Carbonation mechanism of alkali-activated fly ash and slag materials: In view of long-term performance predictions
- 2018CO2 binding capacity of alkali-activated fly ash and slag pastescitations
- 2018Effect of natural carbonation on the pore structure and elastic modulus of the alkali-activated fly ash and slag pastescitations
- 2018Development and application of an environmentally friendly ductile alkali-activated compositecitations
Places of action
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article
Effect of natural carbonation on the pore structure and elastic modulus of the alkali-activated fly ash and slag pastes
Abstract
The aim of this paper was to investigate the effect of natural carbonation on the pore structure, and elastic modulus (E m ) of alkali-activated fly ash (FA) and ground granulated blast furnace slag (GBFS) pastes after one year of exposure in the natural laboratory conditions. The chemical changes due to carbonation were examined by X-ray diffraction (XRD), scanning electron microscope/energy-dispersive X-ray (SEM−EDX) and attenuated total reflectance Fourier transformed infrared spectroscopy (ATR-FTIR). Subsequently, the pore structure and E m of the degraded material were tested by mercury intrusion porosimetry (MIP), nitrogen (N 2 ) adsorption, and nanoindentation. The chemical degradation of alkali-activated pastes due to natural carbonation is showed to be dependent on the GBFS content and their pore structure development. It was found that the pure alkali-activated GBFS paste was not carbonated at all within the tested period due to fine gel pore structure. On the other hand, carbonation of the gel in the pastes consisting FA and GBFS generated significant mineralogical and microstructural changes. The extensive decalcification of the gel was reflected in the increase of nanoporosity. Consequently, the E m of the carbonated pastes decreased. This study suggests that the degradation of alkali-activated FA and GBFS pastes due to carbonation may be accurately evaluated through micromechanical properties measurements rather than only by testing alkalinity of the pore solution and corrosion of reinforcement such as commonly studied carbonation effect in the ordinary Portland cement (OPC)-based materials. ; Materials and Environment ; Concrete Structures