| People | Locations | Statistics |
|---|---|---|
| Naji, M. |
| |
| Motta, Antonella |
| |
| Aletan, Dirar |
| |
| Mohamed, Tarek |
| |
| Ertürk, Emre |
| |
| Taccardi, Nicola |
| |
| Kononenko, Denys |
| |
| Petrov, R. H. | Madrid |
|
| Alshaaer, Mazen | Brussels |
|
| Bih, L. |
| |
| Casati, R. |
| |
| Muller, Hermance |
| |
| Kočí, Jan | Prague |
|
| Šuljagić, Marija |
| |
| Kalteremidou, Kalliopi-Artemi | Brussels |
|
| Azam, Siraj |
| |
| Ospanova, Alyiya |
| |
| Blanpain, Bart |
| |
| Ali, M. A. |
| |
| Popa, V. |
| |
| Rančić, M. |
| |
| Ollier, Nadège |
| |
| Azevedo, Nuno Monteiro |
| |
| Landes, Michael |
| |
| Rignanese, Gian-Marco |
|
Sturm, Patrick
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2024Influence of salt aggregate on the degradation of hybrid alkaline cement (HAC) concretes in magnesium chloride-rich saline solution simulating evaporite rock
- 2023Microwave plasma-assisted reactive HiPIMS of InN films: plasma environment and material characterisationcitations
- 2023Microwave plasma-assisted reactive HiPIMS of InN films: Plasma environment and material characterisationcitations
- 2023Deposition and characterisation of c-axis oriented AlScN thin films via microwave plasma-assisted reactive HiPIMScitations
- 2023Multi-sensory monitoring and ultrasound for quality assurance at underground sealing structures
- 2022The influence of curing temperature on the strength and phase assemblage of hybrid cements based on GGBFS/FA blendscitations
- 2022Multi-sensor conception for safe sealing structures in underground repositories
- 2021Calcined brick clays and mixed clays as supplementary cementitious materials: Effects on the performance of blended cement mortarscitations
- 2021Effect of Curing Temperature on the Alkali Activation of German Brown Coal Fly Ashcitations
- 2019Comparison of calcined illitic clays (brick clays) and low-grade kaolinitic clays as supplementary cementitious materialscitations
- 2019One-part geopolymers and aluminosilicate gel-zeolite composites: factors influencing microstructure and engineering propertiescitations
- 2018Hardening, High-Temperature Resistance and Acid Resistance of One-Part Geopolymers
- 2017Investigations on one-part geopolymers synthesized from different silica sources
- 2017Intumescent geopolymer-bound coatings for fire protection of steel
- 2017Differentiation of the solid-state NMR signals of gel, zeolite phases and water species in geopolymer-zeolite compositescitations
- 2016The effect of heat treatment on the mechanical and structuralproperties of one-part geopolymer-zeolite compositescitations
- 2015Structural investigations on one-part geopolymers with different chemical composition
- 2014Rheological properties of microsilica and sodium aluminate based one-part geopolymers compared to ordinary Portland cement
Places of action
| Organizations | Location | People |
|---|
article
The influence of curing temperature on the strength and phase assemblage of hybrid cements based on GGBFS/FA blends
Abstract
Hybrid cements are composites made of Portland cement or Portland clinker and one or more supplementary cementitious materials like slag, fly ash or metakaolin, activated with an alkali salt. To date, their hydration mechanism and the phase formation at various temperatures is insufficiently understood, partly due to the large variability of the raw materials used. In the present study, three hybrid cements based on ground granulated blast furnace slag, fly ash, Portland clinker and sodium sulfate, and an alkali-activated slag/fly ash blend were cured at 10 and 21.5°C, and subsequently analyzed by XRD, 27Al MAS NMR, and TGA. The compressive strength of the hybrid cements was higher by up to 27% after 91-day curing at 10°C, compared to curing at 21.5°C. The experimental results as well as thermodynamic modeling indicate that the differences in compressive strength were related to a different phase assemblage, mainly differing amounts of strätlingite and C-N-A-S-H, and the associated differences of the volume of hydration products. While the strätlingite was amorphous to X-rays, it could be identified by 27Al MAS NMR spectroscopy, TGA and thermodynamic modeling. The microstructural properties of the hybrid cements and the alkali-activated slag/fly ash blend as well as the compatibility between thermodynamic modeling results and experimental data as a function of curing temperature and time are discussed.