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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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Leermakers, Martine
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Publications (4/4 displayed)
- 2020Determination of Mercury in Fish Sauces by Thermal Decomposition Gold Amalgamation Atomic Absorption Spectroscopy after Preconcentration by Diffusive Gradients in Thin Films Techniquecitations
- 2017Genetic diversity of the giant tiger prawn Penaeus monodon in relation to trace metal pollution at the Tanzanian coastcitations
- 2016Assessment of estrogenic activity in PM10 air samples with the ERE-CALUX bioassaycitations
- 2007Thermal hardening and stucture of a phosphorus containing cementitious model material: Phosphoric acid-wollastonite
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article
Thermal hardening and stucture of a phosphorus containing cementitious model material: Phosphoric acid-wollastonite
Abstract
The reaction of phosphoric acid with wollastonite has been studied for reaction mixtures with a molar ratio r = P/Ca from 0.39 up to 2.9. X-Ray Diffraction and Fourier Transform Infrared Spectroscopy (FT-IR) reveal the formation of the crystalline products brushite (when r is smaller than 1.4) and monetite and calcium dihydrogenphosphate mono hydrate (when r is above 1). Magic Angle Spinning Nuclear Magnetic Resonance Spectroscopy and FT-IR show that amorphous silica is also formed which contains some residual calcium and hydroxyl groups. The proposed reactions are confirmed by the evolution of the reaction enthalpy measured with Differential Scanning Calorimetry (DSC). The reaction was monitored with Modulated Temperature DSC and Dynamic Mechanical Analysis. The sharp increase of the elasticity modulus coincides with the onset of decrease in heat capacity. The setting of the reaction mixture does not slow down the reaction rate.