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In Situ Quasi-Elastic Neutron Scattering Study of the Hydration of Tricalcium Silicate.


pdf icon In Situ Quasi-Elastic Neutron Scattering Study of the Hydration of Tricalcium Silicate. (668 K)
FitzGerald, S. A.; Neumann, D. A.; Rush, J. J.; Bentz, D. P.; Livingston, R. A.

Chemistry of Materials, Vol. 10, 397-402, 1998.

Keywords:

spectroscopy; water; hydration; equations

Abstract:

We report on the novel application of quasi-elastic neutron spectroscopy to study the reaction mechanism between tricalcium silicate and water. The in situ data taken at a series of fixed temperatures varying from 10 to 40 deg C show that the amount of free water in the system remains relatively constant for an initial period, ranging from 1 h at 40 deg C to 16 h at 10 deg C. This is followed by an exponential decrease in the amount of free water that crosses over to a diffusion-limited behavior for later times. Fits to an Avrami type behavior allow us to determine an activation energy. for the hydration process on the order of 30 kJ/mol.