RT Journal Article
T1 Structure of stratlingite and effect of hydration methodology on microstructure
A1 Santacruz-Cruz, María Isabel
A1 Gómez-de-la-Torre, María de los  Ángeles
A1 Álvarez-Pinazo, Gema
A1 Cabeza-Díaz, Aurelio
A1 Cuesta-García, Ana María
A1 Sanz, Jesus
A1 García-Aranda, Miguel Ángel
K1 Rietveld, Método de
K1 Cemento
AB Stratlingite, Ca4Al2(OH)12[AlSi(OH)8]2•2H2O, is an AFm phase which appears as hydration product of aluminum-rich cements. These binders may be calcium aluminate cements, calcium sulfoaluminate cements and also Belite Calcium Sulfo-Aluminate (BCSA) cements. The structure of stratlingite is known from single crystal studies of tiny minerals but their bulk formation, crystal structure and microstructure of powders is poorly understood. Here, we report the synthesis of stratlingite and a complete structural and microstructural characterization by synchrotron X-ray powder diffraction, nuclear magnetic resonance, scanning electron microscopy and thermal analyses. The structural and microstructural models have important implications for a correct quantitative phase analysis of stratlingite in cement pastes (for instance, in pastes of BCSA cements). The microstructure of stratlingite formed in cement pastes is highly dependent on the hydration conditions. In BCSA pastes, the (003) line position of stratlingite appears slightly shifted towards higher diffracting angles (lower inter-layered distance) after stopping hydration compared to that of a similar phase present in a paste analyzed without stopping hydration. This is related to dehydration and disorder. This shift and peak broadening is even larger when the paste has suffered partial dehydration during curing (apart from stopping hydration). A microstructural study is reported
PB ICE publishing
SN 0951-7197
YR 2015
FD 2015
LK http://hdl.handle.net/10630/13623
UL http://hdl.handle.net/10630/13623
LA eng
NO Advances in Cement Research, 2016, 28 (1), 13 – 22
NO This work has been supported by Junta de Andalucía through P11-FQM-07517 research project. I. Santacruz thanks a Ramón y Cajal fellowship, RYC-2008-03523. Synchrotron experiments were performed in MSPD beamline at ALBA Synchrotron Light Facility with the collaboration of François Fauth.
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026