RT Journal Article
T1 In situ synchrotron powder diffraction study of LC3 cement activation at very early ages by C-S-H nucleation seeding.
A1 Morales-Cantero, Alejandro
A1 Gómez-de-la-Torre, María de los  Ángeles
A1 Cuesta-García, Ana María
A1 Santacruz-Cruz, María Isabel
A1 Bernal, Isabel M.R.
A1 Mazanec, Oliver
A1 Dalla-Libera, Alessandro
A1 Borralleras, Pere
A1 García-Aranda, Miguel Ángel
K1 Rietveld, Método de
K1 Radiación sincrotrónica
K1 Cemento - Aditivos
K1 Dióxido de carbono
AB Limestone Calcined Clay Cements, LC3, are being widely researched as low-carbon binders. However, the hydration reactions during the first day are key for their performances and they were not well known. Here, we employ in situ synchrotron X-ray powder diffraction to understand the hydration reactions that take place during the first day. The influence of two superplasticisers and three strength-enhancing admixtures have been investigated. The diffraction data were analysed by the Rietveld method and the results compared to mass balance calculations. For LC3 binders and in the absence of strength-enhancing admixtures, the hydration rates of the clinker phases, i.e. C3S, C3A and C4AF, are accelerated because of the filler effect. The C-S-H based-admixtures further accelerate the hydration of tricalcium aluminate and ferrite. Chiefly, it is firmly proved that the pozzolanic reaction takes place from 7 h onwards in the studied experimental conditions. The estimated degree of hydration of metakaolin at 22 h, in the studied binders, was ∼10 %.
PB Elsevier
YR 2024
FD 2024-02-22
LK https://hdl.handle.net/10630/30626
UL https://hdl.handle.net/10630/30626
LA eng
NO This research was partly supported by the research grant PID2020-114650RB-I00 which is co-funded by ERDF. ALBA synchrotron is thanked for providing beamtime at the BL04-MSPD beamline. We thank thorough discussions with Peter Schwesig and Sebastien Dhers from Master Builders Solutions. Funding for open access charge: Universidad de Malaga/CBUA
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 21 ene 2026