RT Journal Article
T1 Multiscale understanding of tricalcium silicate hydration reactions
A1 Cuesta-García, Ana María
A1 Zea-Garcia, Jesus D.
A1 Londono-Zuluaga, Diana
A1 Gómez-de-la-Torre, María de los  Ángeles
A1 Santacruz-Cruz, María Isabel
A1 Vallcorba, Oriol
A1 Dapiaggi, Monica
A1 Sanfélix, Susana G.
A1 García-Aranda, Miguel Ángel
AB Tricalcium silicate, the main constituent of Portland cement, hydrates to produce crystalline calciumhydroxide and calcium-silicate-hydrates (C-S-H) nanocrystalline gel. This hydration reaction is poorlyunderstood at the nanoscale. The understanding of atomic arrangement in nanocrystalline phases isintrinsically complicated and this challenge is exacerbated by the presence of additional crystallinephase(s). Here, we use calorimetry and synchrotron X-ray powder diffraction to quantitatively followtricalcium silicate hydration process: i) its dissolution, ii) portlandite crystallization and iii) C-S-Hgel precipitation. Chiefly, synchrotron pair distribution function (PDF) allows to identify a defectiveclinotobermorite, Ca11Si9O28(OH)2.8.5H2O, as the nanocrystalline component of C-S-H. Furthermore,PDF analysis also indicates that C-S-H gel contains monolayer calcium hydroxide which is stretchedas recently predicted by first principles calculations. These outcomes, plus additional laboratorycharacterization, yielded a multiscale picture for C-S-H nanocomposite gel which explains the observeddensities and Ca/Si atomic ratios at the nano- and meso- scales.
PB Nature Publishing Group
YR 2018
FD 2018-06
LK https://hdl.handle.net/10630/15945
UL https://hdl.handle.net/10630/15945
LA eng
NO Scientific ReportS (2018) 8:8544
NO This work has been supported by Spanish MINECO through BIA2014-57658-C2-2-R, which is co-funded byFEDER, BIA2014-57658-C2-1-R and I3 (IEDI-2016-0079) grants. We also thank CELLS-ALBA (Barcelona,Spain) for providing synchrotron beam time at BL04-MSPD beamline.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 19 ene 2026