RT Journal Article
T1 4D nanoimaging of early age cement hydration.
A1 Shirani, Shiva
A1 Cuesta-García, Ana María
A1 Morales-Cantero, Alejandro
A1 Santacruz-Cruz, María Isabel
A1 Díaz, Ana
A1 Trtik, Pavel
A1 Holler, Mirko
A1 Rack, Alexander
A1 Lukic, Bratislav
A1 Brun, Emmanuel
A1 Salcedo, Inés R.
A1 García-Aranda, Miguel Ángel
K1 Cemento Portland
K1 Sistemas de imágenes
K1 Cristalografía por rayos
K1 Tomografía
AB Despite a century of research, our understanding of cement dissolution andprecipitation processes at early ages is very limited. This is due to the lack ofmethods that can image these processes with enough spatial resolution,contrast and field of view. Here, we adapt near-field ptychographic nanotomographyto in situ visualise the hydration of commercial Portland cement in arecord-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 ofsmall alite grains in the acceleration period, ∼100 nm/h, is approximately fourtimes 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 complementedby laboratory and synchrotron microtomographies, allowing to measure theparticle size distributionswith time. 4D nanoimagingwill allow mechanisticallystudy dissolution-precipitation processes including the roles of acceleratorsand superplasticizers.
PB Springer Nature
YR 2023
FD 2023-05-08
LK https://hdl.handle.net/10630/26546
UL https://hdl.handle.net/10630/26546
LA eng
NO 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
NO Financial support from PID2019-104378RJ-I00 research grant, which isco-funded by FEDER, is gratefully acknowledged. ToScA (United Kingdom) is gratefully acknowledged for awarding Jim Elliott Award to Shiva Shirani, I.R.S. is thankful for funding from PTA2019-017513–I.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026