Time-resolved studies of the early hydration of cements using synchrontron energy-dispersive diffraction

P. Barnes Industrial Materials Group, Dept. Crystallography, Birkbeck College, University of London, Malet Street, London, WC1E 7HX, UK; Daresbury Laboratory, Warrington, WA4 4AD

S. M. Clark Industrial Materials Group, Dept. Crystallography, Birkbeck College, University of London, Malet Street, London, WC1E 7HX, UK; Daresbury Laboratory, Warrington, WA4 4AD

D. Häusermann Industrial Materials Group, Dept. Crystallography, Birkbeck College, University of London, Malet Street, London, WC1E 7HX, UK; Euroc Research AB, IDEON, Lund, Sweden

E. Henderson Industrial Materials Group, Dept. Crystallography, Birkbeck College, University of London, Malet Street, London, WC1E 7HX, UK

C. H. Fentiman Industrial Materials Group, Dept. Crystallography, Birkbeck College, University of London, Malet Street, London, WC1E 7HX, UK

M. N. Muhamad Industrial Materials Group, Dept. Crystallography, Birkbeck College, University of London, Malet Street, London, WC1E 7HX, UK

S. Rashid Industrial Materials Group, Dept. Crystallography, Birkbeck College, University of London, Malet Street, London, WC1E 7HX, UK; Lafarge Special Cements, 730 London Rd., Grays, Essex, RM16 1UJ

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Abstract

We outline the need to study the early hydration of cements by dynamic diffraction methods, and demonstrate how this can be done using a “hydration cell” designed specifically for the parallel beam geometry of synchrotron energy-dispersive diffraction. The method has been applied to three systems: a model component of portland cement, a high-alumina cement and an ettringite-based cement. The results show how this technique might be used to gather information on the kinetics of the chemical processes involved. In the case of ettringite, we can follow dynamically the crystallisation process on an unprecedented 20 second time scale.

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Time-resolved studies of the early hydration of cements using synchrontron energy-dispersive diffraction

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Time-resolved studies of the early hydration of cements using synchrontron energy-dispersive diffraction

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