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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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Gu, Jun
Vrije Universiteit Brussel
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (13/13 displayed)
- 2024Thermal Reactivation of Hydrated Cement Paste: Properties and Impact on Cement Hydrationcitations
- 2024Alkali-Activated Copper Slag with Carbon Reinforcement: Effects of Metakaolinite, OPC and Surfactants
- 2023Influence of the curing conditions on the mechanical properties of alkali-activated copper slag-basalt-based thin composites
- 2023The Influence of the Thermal Treatment of Copper Slag on the Microstructure and Performance of Phosphate Cementscitations
- 2015Calibration and correction procedure for quantitative out-of-plane shearographycitations
- 2012'Gradient' polar scan technique for material characterizationcitations
- 2012Polar scan technique for material characterization and identification of new operating regimes
- 2012Study of the geometrical inaccuracy on a SPIF two-slope pyramid by finite element simulationscitations
- 2010Resonance Fatigue Testing of Test Beams Made of Composite Material
- 2006Stereolithographic Specimen to Calibrate Permeability Measurements for RTM Flow Simulations
- 2001Behaviour of Sandwich Panels with E-glass Fibre Reinforced Cementitious Faces under Repeated Loading
- 2000The use of a new cementitious glass fibre reinforced composite in sandwich structures for building applications
- 2000Evaluation of fatigue and durability properties of E-glass reinforced phosphate cementitious composite
Places of action
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article
Alkali-Activated Copper Slag with Carbon Reinforcement: Effects of Metakaolinite, OPC and Surfactants
Abstract
opper slag is an industrial residue with a large unutilized fraction. This study presents the development of alkali-activated composites from a copper slag named Koranel®. The effects of metakaolinite, ordinary Portland cement (OPC) and surfactants were investigated. The reactivity of Koranel with potassium silicate solutions with molar ratio R = SiO2/K2O varying from 1 to 2.75, with 0.25 intervals, was investigated using isothermal calorimetry. The reactivity was relatively low at 20 ◦C; the reaction started after a few hours with a low silica modulus, to several weeks with the highest silica modulus. The substitution of Koranel by OPC (5 wt.%) or by metakaolinite (10–20 wt.%), both led to higher reaction heat and rate; meanwhile, the addition of 2 wt.% polyethylene glycol/2-methyl 2,4 pentanediol delayed the reaction time in the system containing metakaolinite. Raising the curing temperature from 20 ◦C to 80 ◦C shortened the setting time of the low reactive systems, from several days to almost instantaneous, opening perspectives for their application in the production of prepreg composite materials. The use of carbon fabric as reinforcement in the alkali-activated matrix led to composite materials with flexural strength reaching 88 MPa and elastic modulus of about 19 GPa—interesting for engineering applications such as high-strength lightweight panels.