RT Journal Article
T1 In-situ early-age hydration study of sulfobelite cements by synchrotron powder diffraction
A1 Álvarez-Pinazo, Gema
A1 Cuesta-García, Ana María
A1 García-Maté, Marta
A1 Santacruz-Cruz, María Isabel
A1 Ramírez-Losilla, Enrique
A1 Sanfélix, Susana G.
A1 Fauth, François
K1 Cemento
AB Eco-friendly belite calcium sulfoaluminate (BCSA) cement hydration behavior is not yet well understood. Here,we report an in-situ synchrotron X-ray powder diffraction study for the first hours of hydration of BCSA cements.Rietveld quantitative phase analysis has been used to establish the degree of reaction (α). The hydration of a mixture of ye'elimite and gypsum revealed that ettringite formation (α ~70% at 50 h) is limited by ye'elimite dissolution. Two laboratory-prepared BCSA cements were also studied: non-active-BCSA and active-BCSA cements,with β- and α′H-belite as main phases, respectively. Ye'elimite, in the non-active-BCSA system, dissolves at higher pace (α ~25% at 1 h) than in the active-BCSA one (α ~10% at 1 h),with differences in the crystallization of ettringite (α ~30% and α ~5%, respectively). This behavior has strongly affected subsequent belite and ferrite reactivities, yielding stratlingite and other layered phases in non-active-BCSA. The dissolution and crystallization processes are reported and discussed in detail.
PB Karen Scrivener
SN 0008-8846
YR 2014
FD 2014
LK http://hdl.handle.net/10630/13657
UL http://hdl.handle.net/10630/13657
LA eng
NO Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 4 mar 2026