Published April 26, 2023 | Version v1
Dataset Open

Dataset for " 4D nanoimaging of early age cement hydration " Nature Communications paper

Description

Abstract of the Nature Communications paper (doi: https://doi.org/10.1038/s41467-023-38380-1) from this dataset is: "Despite a century of research, our understanding of cement dissolution and precipitation processes at early ages is very limited. This is due to the lack of methods that can image these processes with enough spatial resolution, contrast and field of view. Here, we adapt near-field ptychographic nanotomography to in situ visualise the hydration of commercial Portland cement in a record-thick capillary. At 19h, porous C-S-H gel shell, thickness of 500 nm, covers every alite grain enclosing a water gap. The spatial dissolution rate of small alite grains in the acceleration period, ∼100 nm/h, is approximately four times faster than that of large alite grains in the deceleration stage, ∼25 nm/h. Etch-pit development has also been mapped out. This work is complemented by laboratory and synchrotron microtomographies, allowing to measure the particle size distributions with time. 4D nanoimaging will allow mechanistically study dissolution-precipitation processes including the roles of accelerators and superplasticizers. "

Notes

Financial support from PID2019-104378RJ-I00 research grant, which is co-funded by FEDER, is gratefully acknowledged. SLS is thanked for granting beamtime at cSAXS under proposal 20210147. ESRF is thanked for beamtime at ID19. ToScA (United Kingdom) is gratefully acknowledged for awarding Jim Elliott Award to Shiva Shirani, which supported her stay at ESRF. Dr. Manuel Guizar-Sicairos is thanked for his assistance with the ptychography data processing. IRS is thankful for funding from PTA2019-017513–I.

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