| 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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Ehsani, Ahmad
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (10/10 displayed)
- 2024Influence of Calcining Temperature on the Mineralogical and Mechanical Performance of Calcined Impure Kaolinitic Clays in Portland Cement Mortarscitations
- 2022Potential of calcined brick clay as a partial substitution in blended cement mortarscitations
- 2022Mechanochemical Characterisation of Calcined Impure Kaolinitic Clay as a Composite Binder in Cementitious Mortarscitations
- 2022Performance of low-grade kaolinitic clay as a cement substitute in mortar: A comparative study with fly ash
- 2022Use of low grade kaolinitic clays in development of a pozzolan-cement binder system
- 2020Effect of Power Ultrasound on the Portland cement paste and mortar: study of chemical shrinkage and compressive and flexural strength development
- 2019Influence of power ultrasound on the portland cement pore solution compositions
- 2018Application of power ultrasound to cementitious materials: Advances, issues and perspectivescitations
- 2017Effect of nanosilica on the compressive strength development and water absorption properties of cement paste and concrete containing Fly Ashcitations
- 2015Investigating the effect of the cement paste and transition zone on strength development of concrete containing nanosilica and silica fumecitations
Places of action
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document
Effect of Power Ultrasound on the Portland cement paste and mortar: study of chemical shrinkage and compressive and flexural strength development
Abstract
Application of Power ultrasound (PUS) to the Portland cement mortar is the subject of this study to improve the kinetics of hydration and mechanical properties. The present work investigates the effect of direct PUS with various frequencies and power to the Portland cement paste and mortar mixtures. In regards to the mortars, two scenarios for PUS application were studied: 1) ultrasound treatment of the whole mortar mixtures and 2) addition of aggregates to the ultrasound-treated paste. The chemical shrinkages of cement paste mixes were measured over 14 days by developing an automated set up and using the image analysis technique. The mechanical properties of hardened mortar prisms were evaluated by studying the compressive and flexural strength development up to 91 days. The results show that lower frequency-high power PUS slightly changes the chemical shrinkage behaviour of cement pastes. The mechanical properties of mortars with the paste treated with the same PUS characteristic showed significant improvement in flexural strength both in early age and long term. The SEM micrographs of fracture surfaces confirmed improved interfacial transition zone between aggregates and cement paste in mortar samples.Application of Power ultrasound (PUS) to the Portland cement mortar is the subject of this study to improve the kinetics of hydration and mechanical properties. The present work investigates the effect of direct PUS with various frequencies and power to the Portland cement paste and mortar mixtures. In regards to the mortars, two scenarios for PUS application were studied: 1) ultrasound treatment of the whole mortar mixtures and 2) addition of aggregates to the ultrasound-treated paste. The chemical shrinkages of cement paste mixes were measured over 14 days by developing an automated set up and using the image analysis technique. The mechanical properties of hardened mortar prisms were evaluated by studying the compressive and flexural strength development up to 91 days. The results show that lower frequency-high power PUS slightly changes the chemical shrinkage behaviour of cement pastes. The mechanical properties of mortars with the paste treated with the same PUS characteristic showed significant improvement in flexural strength both in early age and long term. The SEM micrographs of fracture surfaces confirmed improved interfacial transition zone between aggregates and cement paste in mortar samples.