Large SEM-BSE images of hydrated belite of ages from 1 day up to 1 year

This dataset contains 8-Bit SEM-BSE images of commercially available dicalcium silicate (C2S; belite; Vustah, Czech Republic). The belite was mixed with a water/binder ratio of 0.5. The paste was the cast in small sealed containers, which were submersed with water. The specimens were stored at 22 ± 2°C. After the desired hydration times (1, 7, 14, 28, 84, 365 days) the hydration was stopped by immersing the prisms in isopropanol and drying them at 60°C for 12 hours. The dried prisms were then embedded in low viscosity epoxy resin and mechanically polished using diamond paste with a grain size down to 0.25 µm. Finally, the specimens were coatet with a thin layer of carbon to avoid charging. The images were acquired at 12 kV using a CBS (concentric backscatter) detector within a Thermo Fisher Scientific Helios G4 UX. All images have a resolution of 36864 x 36864 px at 42.1550 nm/px (1.554 x 1.554 mm² = 2.41 mm²) Table 1: Basic information like resolution, size and phase composition of the images. file age pores hydrates clinker in days area-% area-% area-% Layer-C2S 1d (stitched).tif 1 46.2 15.4 38.4 Layer-C2S 7d (stitched).tif 7 43.2 27.0 30.1 Layer-C2S 7d (2) (stitched).tif 7 46.3 23.9 29.8 C2S 14d.tif 14 31.4 43.5 25.2 C2S 28d.tif 28 15.9 62.6 21.5 C2S 84d.tif 84 19.3 65.6 15.2 C2S 365d.tif 365 23.8 64.4 12.0 *not processed The proportions of pores, hydrates and unhydrated clinker shown in table 1 are the result of manual thresholding of denoised versions of these images and may therefore differ to own measurements. The scaling is backed into the file and can be read using ImageJ/Fiji. The unstitched files are provded as 7z archives. The sub-images were arranged in a 10 x 10 grid. The pixel scaling of these files is the same as in the larger files. The overlap is ~10%. The filename indicates the position of the Tile. For example, "Tile_005-008-000000_0-000.s0001_e00.tif" is in the fifth row and the eigth column. The indices are counted from 1 to 10. Internal note These files are included in the following MAPS datasets: 2023_05_24 C32-C2S 14-84 d 2023_06_08 C2S-C3S 28d-1year 2023_07_18 C3S 7d, C2S 1d, 7d, 3C3S-1C2S 7d