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| Naji, M. |
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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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| 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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Hay, Rotana
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Publications (5/5 displayed)
- 2022Shrinkage, hydration, and strength development of limestone calcined clay cement (LC3) with different sulfation levelscitations
- 2022Phase evolution, micromechanical properties, and morphology of calcium (alumino)silicate hydrates C-(A-)S-H under carbonationcitations
- 2020Influencing factors on micromechanical properties of calcium (alumino) silicate hydrate C-(A-)S-H under nanoindentation experimentcitations
- 2020Hydration, carbonation, strength development and corrosion resistance of reactive MgO cement-based compositescitations
- 2019Effect of volcanic ash pozzolan or limestone replacement on hydration of Portland cementcitations
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article
Influencing factors on micromechanical properties of calcium (alumino) silicate hydrate C-(A-)S-H under nanoindentation experiment
Abstract
<p>In Portland cement-based concrete, calcium (alumino) silicate hydrate (C-(A-)S-H) is the principal binding phase that governs its physical, mechanical, and durability properties. In this study, micromechanical properties of compacts made of synthetic C-(A-)S-H powder were investigated with nanoindentation, and various influencing factors were identified. It was revealed that a normal distribution and convergence of test data could be attained with an indentation depth > 350 nm. Higher conditioning relative humidity, pressure, and holding time aided consolidation of the powder and led to an improved elastic modulus. No remarkable influence of strain rate (0.025–0.1 s<sup>−1</sup>) and vibration frequency was noted. While the Al-incorporated C-A-S-H exhibited superior mechanical properties relative to C-S-H, all the C-(A-)S-H compacts yielded lower elastic modulus values as compared to data from fully hydrated C<sub>3</sub>S paste, mainly attributable the phase bonding, packing density, chemical composition, and the presence of phases other than C-(A-)S-H in the C<sub>3</sub>S sample.</p>