| 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 |
|
Diaz, Ana
Paul Scherrer Institute
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (20/20 displayed)
- 2024Phase-separated polymer blends for controlled drug delivery by tuning morphologycitations
- 20234D nanoimaging of early age cement hydrationcitations
- 20233D-Imaging of synapses in neuronal tissues with synchrotron X-ray ptychographycitations
- 2023In situ compression of micropillars under coherent X-ray diffraction: a case study of experimental and data-analysis constraintscitations
- 2023Simple Synthesis of Monodisperse Ultrasmall Au Icosahedral Nanoparticlescitations
- 2022Near-infrared analysis of nanofibrillated cellulose aerogel manufacturingcitations
- 2022Near-infrared analysis of nanofibrillated cellulose aerogel manufacturingcitations
- 2022Evolution of Hierarchically Porous Nickel Alumina Catalysts Studied by X‐Ray Ptychographycitations
- 2022Temperature-dependent dynamic plasticity of micro-scale fused silicacitations
- 2021Quantitative analysis of cementitious materials by X-ray ptychographic nanotomography
- 2020Comparison of small‐angle neutron and X‐ray scattering for studying cortical bone nanostructurecitations
- 2019Quantitative disentanglement of nanocrystalline phases in cement pastes by synchrotron ptychographic X-ray tomographycitations
- 2018Photonic materials for high-temperature applications: synthesis and characterization by X-ray ptychographic tomography
- 2017Anisotropy development during HDPE necking studied at the microscale with in situ continuous 1D SAXS scanscitations
- 2016Novel micro-reactor flow cell for investigation of model catalysts using in situ grazing-incidence X-ray scatteringcitations
- 2016Influence of gas atmospheres and ceria on the stability of nanoporous gold studied by environmental electron microscopy and in situ ptychography
- 2016Influence of gas atmospheres and ceria on the stability of nanoporous gold studied by environmental electron microscopy and in situ ptychographycitations
- 2014Scanning X-ray strain microscopy of inhomogeneously strained Ge micro-bridgescitations
- 2013Density mapping of hardened cement paste using ptychographic X-ray computed tomographycitations
- 2012Preparation and characterization of ellipsoidal-shaped thermosensitive microgel colloids with tailored aspect ratioscitations
Places of action
| Organizations | Location | People |
|---|
article
Quantitative disentanglement of nanocrystalline phases in cement pastes by synchrotron ptychographic X-ray tomography
Abstract
<jats:p>Mortars and concretes are ubiquitous materials with very complex hierarchical microstructures. To fully understand their main properties and to decrease their CO<jats:sub>2</jats:sub> footprint, a sound description of their spatially resolved mineralogy is necessary. Developing this knowledge is very challenging as about half of the volume of hydrated cement is a nanocrystalline component, calcium silicate hydrate (C-S-H) gel. Furthermore, other poorly crystalline phases (<jats:italic>e.g.</jats:italic> iron siliceous hydrogarnet or silica oxide) may coexist, which are even more difficult to characterize. Traditional spatially resolved techniques such as electron microscopy involve complex sample preparation steps that often lead to artefacts (<jats:italic>e.g.</jats:italic> dehydration and microstructural changes). Here, synchrotron ptychographic tomography has been used to obtain spatially resolved information on three unaltered representative samples: neat Portland paste, Portland–calcite and Portland–fly-ash blend pastes with a spatial resolution below 100 nm in samples with a volume of up to 5 × 10<jats:sup>4</jats:sup> µm<jats:sup>3</jats:sup>. For the neat Portland paste, the ptychotomographic study gave densities of 2.11 and 2.52 g cm<jats:sup>−3</jats:sup> and a content of 41.1 and 6.4 vol% for nanocrystalline C-S-H gel and poorly crystalline iron siliceous hydrogarnet, respectively. Furthermore, the spatially resolved volumetric mass-density information has allowed characterization of inner-product and outer-product C-S-H gels. The average density of the inner-product C-S-H is smaller than that of the outer product and its variability is larger. Full characterization of the pastes, including segmentation of the different components, is reported and the contents are compared with the results obtained by thermodynamic modelling.</jats:p>