RT Journal Article
T1 Early hydration of belite-ye’elimite-ferrite cements: Role of admixtures
A1 Pérez-Bravo, Raquel
A1 Morales-Cantero, Alejandro
A1 Cuesta-García, Ana María
A1 García-Aranda, Miguel Ángel
A1 Santacruz-Cruz, María Isabel
A1 Gómez-de-la-Torre, María de los  Ángeles
K1 Radiación sincrotrónica
AB The effect of TIPA and CaCl2 on early hydration, i.e. 24 h, of a B-BYF cement has been studied by in situ synchrotron X-ray powder diffraction, calorimetry, thermal analysis, NMR, and rheological measurements of the pastes and mechanical strength of the corresponding mortars. The addition of 0.05 %bwc (by weight of cement) of TIPA reduced the viscosity of the paste during the first minutes of hydration but, after the end of the induction period, ~7 h, it favored the formation of AFt compared to the reference paste. The latter is likely due to the acceleration of the dissolution of the amorphous aluminates and sulfates by the presence of TIPA. These results correlate with the increase of ~169% of the 1-day mechanical strengths. The addition of 2.0 %bwc of CaCl2accelerated the dissolution rate of ye’elimite, causing an increase of the amount of precipitated ettringite even before the end of the induction period, which has been shorted to ~6 h. The 1-day mechanical strengths of the mortars with this admixture outperforms that of the reference mortar by 181%. Finally, ferrite and α’ H-belite reactivities were not affected by the addition of any of these admixtures during the first 24 h of hydration of this cement.
PB Elsevier
YR 2023
FD 2023
LK https://hdl.handle.net/10630/26063
UL https://hdl.handle.net/10630/26063
LA eng
NO Construction and Building Materials 371 (2023) 130765
NO P18-RT-720 from the Andalusian regional government and PID2019-104378RJ-I00 from the Spanish government are gratefully acknowl-edged. ALBA synchrotron is acknowledged for providing with beamtime at MSPD beamline. Funding for open access charge: Universidad de Málaga / CBUA.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026