We are pleased to announce that the next ROC&TOK webinar will take place on May 8th, 2025 at 3PM CEST/Paris Time and will be one hour long (30-minute presentation + 30-minute interaction). The registration for this webinar is free.
Speaker: Dr Shiva Shirani, University of Malaga, Spain
Hosts: Dr Prannoy Suraneni, University of Miami, United States and Prof. Karen Scrivener, EPFL, Switzerland
Title: Advanced Quantitative Synchrotron X-ray Imaging of Cementitious Materials
This research includes observations on hydration kinetics, microstructural changes and the effect of curing temperatures on cement properties. It also investigates the development of innovative methods for measuring cement hydration in situ, with the aim of improving the understanding and optimising the use of cementitious materials. The 4D (3D+time) tomographic study was reported with an astonishing spatial resolution of 250 nm and excellent contrast between the different components. The hydration of alite particles, the formation of C-S-H gel shells surrounding every alite grains and the passage of water through these shells were observed in the tomograms. Many interesting features have been identified in this 4D multi-modality X-ray imaging study, from laboratory micro tomography to synchrotron phase contrast and synchrotron ptychographic nanoimaging; such as spatial dissolution rate of anhydrous particles, etch-pits growth rate of alite particles, C-S-H gel shell growth rate, etc.
