2026-05-30T01:30:07Zhttps://riuma.uma.es/rest/oai/requestoai:riuma.uma.es:10630/265462026-02-03T11:09:05Zcom_10630_2254col_10630_37953
4D nanoimaging of early age cement hydration.
Shirani, Shiva
Cuesta-García, Ana María
Morales-Cantero, Alejandro
Santacruz-Cruz, María Isabel
Díaz, Ana
Trtik, Pavel
Holler, Mirko
Rack, Alexander
Lukic, Bratislav
Brun, Emmanuel
Salcedo, Inés R.
García-Aranda, Miguel Ángel
Cemento Portland
Sistemas de imágenes
Cristalografía por rayos
Tomografía
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 19 h, 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 distributionswith time. 4D nanoimagingwill allow mechanistically
study dissolution-precipitation processes including the roles of accelerators
and superplasticizers.
2023-05-12T08:59:56Z
2023-05-12T08:59:56Z
2023-05-08
journal article
Shirani, Shiva & Cuesta, Ana & Morales, Alejandro & Santacruz, Isabel & Diaz, Ana & Trtik, Pavel & Holler, Mirko & Rack, Alexander & Lukić, Bratislav & Brun, Emmanuel & Salcedo, Inés & Aranda, Miguel. (2023). 4D nanoimaging of early age cement hydration. Nature Communications. 14. 10.1038/s41467-023-38380-1
https://hdl.handle.net/10630/26546
10.1038/s41467-023-38380-1
eng
http://creativecommons.org/licenses/by-nc-nd/4.0/
open access
Attribution-NonCommercial-NoDerivatives 4.0 Internacional
Springer Nature