Advances in imaging, scattering, spectroscopy, and machine learning-aided approaches for multiscale characterization of cementitious systems

Characterization of hydrated magnesium carbonate materials with synchrotron radiation-based scanning transmission X-ray spectromicroscopy

“…A recent review by Quku et al summarises the current status of cementitious systems research using lab and SR-based techniques. 12 In our study of HMCs, we implemented SR-based Scanning Transmission X-ray microscopy (STXM) which is valuable due to its high spatial resolution, chemical sensitivity, and elemental specificity. Its ability to operate in the soft X-ray region enables non-destructive analysis of particles with micrometer thicknesses, providing crucial insights into the formation processes and structural characteristics of these compounds.…”

“…STXM-XANES has been used to study various cementitious materials earlier, in majority Ca-based systems for example calcium silicates, 15–20 ancient concrete specimens 21 and Limestone Calcined Clay Cement (LC3). 12 One of the advantages of STXM is the possibility to study wet samples. Monteiro et al have conducted a comprehensive work on green cements, and they have for example carried out soft X-ray imaging of aqueous cementitious solutions, following in situ formation of different phases.…”