| 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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Schutter, Geert De
Ghent University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (29/29 displayed)
- 2024Acoustic signatures of hydration and microcracking in early-age concretecitations
- 2023Assessment of pore structure characteristics and tortuosity of 3D printed concrete using mercury intrusion porosimetry and X-ray tomographycitations
- 2023Future perspectives for alkali-activated materials: from existing standards to structural applicationscitations
- 2023Recent progress and technical challenges in using calcium sulfoaluminate (CSA) cementcitations
- 2023Evaluation of copper slag and stainless steel slag as replacements for blast furnace slag in binary and ternary alkali-activated cementscitations
- 2023Geometric Conformability of 3D Concrete Printing Mixtures from a Rheological Perspectivecitations
- 2023Characterisation of alkali-activated stainless steel slag and blast-furnace slag cementscitations
- 2023Magneto-rheology control of cement paste containing Fe3O4 nanoparticles in view of reducing or preventing formwork leakagecitations
- 2023Active rheology control of cementitious materials with responsive mineral particles
- 2023Application of active rheology control to 3D printing of cementitious materialscitations
- 2023The sensitivity of Acoustic Emission (AE) for monitoring the effect of SAPs in fresh concrete
- 2022Shrinkage and settlement assessment of fresh concrete using Digital Image Correlation (DIC) and Acoustic Emission (AE)
- 2022Properties and testing of printed cement-based materials in hardened statecitations
- 2022Printable Cement-Based Materials: Fresh Properties Measurements and Controlcitations
- 2022Stiffening controllable concrete modified with redispersible polymer powder for twin-pipe printingcitations
- 2022Transport properties of 3D printed cementitious materials with prolonged time gap between successive layerscitations
- 2022Adhesive properties of fresh cementitious materials as measured by the tack test
- 2022Using limestone powder as a carrier for the accelerator in extrusion-based 3D concrete printingcitations
- 2021Possibilities of fly ash as responsive additive in magneto-rheology control of cementitious materialscitations
- 2021Quantitative assessment of the influence of external magnetic field on clustering of nano-Fe3O4 particles in cementitious pastecitations
- 2021Active stiffening control by magnetically induced blocking in confined flow of fly ash pastescitations
- 2020Structural Build-Up of Cementitious Paste Under External Magnetic Fieldscitations
- 2019Microstructural characterization of 3D printed cementitious materialscitations
- 2019Stiffening control of printable cement paste with flash setting admixture
- 2019Full-Field Settlement Measurement at Fresh Cementitious Material by Digital Image Correlation
- 2019Influence of nano-clay on rheology, fresh properties of hydration and strength of cement-based mortarscitations
- 2018Proceedings of the Symposium on Concrete Modelling
- 2016Chloride interaction with concretes subjected to a permanent splitting tensile stress level of 65%citations
- 2008X-ray computed microtomography on cementitious materials
Places of action
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article
Microstructural characterization of 3D printed cementitious materials
Abstract
Three-dimensional concrete printing (3DCP) has progressed rapidly in recent years. With the aim to realize both buildings and civil works without using any molding, not only has the need for reliable mechanical properties of printed concrete grown, but also the need for more durable and environmentally friendly materials. As a consequence of super positioning cementitious layers, voids are created which can negatively affect durability. This paper presents the results of an experimental study on the relationship between 3DCP process parameters and the formed microstructure. The effect of two different process parameters (printing speed and inter-layer time) on the microstructure was established for fresh and hardened states, and the results were correlated with mechanical performance. In the case of a higher printing speed, a lower surface roughness was created due to the higher kinetic energy of the sand particles and the higher force applied. Microstructural investigations revealed that the amount of unhydrated cement particles was higher in the case of a lower inter-layer interval (i.e., 10 min). This phenomenon could be related to the higher water demand of the printed layer in order to rebuild the early Calcium-Silicate-Hydrate (CSH) bridges and the lower amount of water available for further hydration. The number of pores and the pore distribution were also more pronounced in the case of lower time intervals. Increasing the inter-layer time interval or the printing speed both lowered the mechanical performance of the printed specimens. This study emphasizes that individual process parameters will affect not only the structural behavior of the material, but they will also affect the durability and consequently the resistance against aggressive chemical substances.