These are the datasets analysed in "Fracturing process of concrete under uniaxial and triaxial compression: insights from in-situ x-ray mechanical tests" by Stamati et. al. (submitted on June 2020 in Cement and Concrete Research) The datasets contain the reconstructed x-ray 3D images of selected tests and the corresponding DVC analysis. Note that details regarding the DVC analysis can be found in the paper. Each folder contains a separate test; uniaxial compression ("C-02") and triaxial compression at 5MPa ("TX5-01"), 10MPa ("TX10-01") and 15MPa ("TX15-01") confining pressures. For each test, folder 01 contains the first scan, where 01 is the reference state for the DVC analyis. Folder 01 also contains the image of the labelled largest aggregates used for the discrete DVC. Folrders 02-XX contain the scans at intermediate loading steps and the corresponding DVC analysis; "reg" contains the registration result in downscaled 2-binning images. "ddic" contains the discrete DVC computation. "ldic" contains the local DVC computation, before and after the merge and filtering of the grid and discrete DVC fields. "strains" contains the strain fields coming from the corrected merged DVC field. Folder "stressStrain" contains the stress-strain curves measured during the tests after subtracting the displacement corresponding to the loading system. Folder "doubleScanUniaxial" contains the two reconstructed images of the "repeated scan" of the uniaxial tests, from which the DVC measurement uncertainties were evaluated.