RT Journal Article
T1 Hydration of C3S and Al-doped C3S in the presence of gypsum
A1 Neto, José da Silva Andrade
A1 Rodríguez, Erick D.
A1 Monteiro, Paulo J. M.
A1 Gómez-de-la-Torre, María de los  Ángeles
A1 Kirchheim, Ana Paula
K1 Cemento
K1 Sulfatos
K1 Yeso
AB A complete understanding of the effect of gypsum on the C3S hydration and the role of aluminum has not been achieved. The effects of gypsum (at 2.5 wt% and 5.0 wt%) on the hydration of tricalcium silicate (C3S) andaluminum-doped C3S (Al-C3S) hydration are assessed. Isothermal calorimetry, thermodynamic modeling, XRD,TGA, and 27Al and 29Si MAS-NMR were performed to analyze gypsum's influence on the hydration of C3S and Al-C3S. The inclusion of gypsum retarded the initial hydration (first 3 h) for both C3S and Al-C3S due to theinteraction between the sulfate ions and C3S. In contrast, gypsum enhanced the hydration of both C3S and Al-C3Safterward. The removal of Al3+ ions of the pore solution by the formation of ettringite is not the mechanismbehind the enhancement of C3S hydration by gypsum, which mainly results from changes in C-S-H morphologyand increases in the ionic strength.
PB Elsevier
YR 2022
FD 2022
LK https://hdl.handle.net/10630/23441
UL https://hdl.handle.net/10630/23441
LA eng
NO Cement and Concrete Research 152 (2022) 106686
NO CAPES (Coordination for the Improvement of Higher Education Personnel) [88882.439908/2019-01]. Spanish Junta de Andalucía [UMA18-FEDERJA-095 and P18-RT-720] Graduate Program in Civil Engineering: Construction and Infrastructure (PPGCI) of the FederalUniversity of Rio Grande do Sul (UFRGS). CNPq (Brazilian National Council for Scientific and Technological Development) through the research fellowship PQ CNPq.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026