In Situ Quasi-Elastic Neutron Scattering Study of the Hydration of Tricalcium Silicate.
In Situ Quasi-Elastic Neutron Scattering Study of the
Hydration of Tricalcium Silicate.
FitzGerald, S. A.; Neumann, D. A.; Rush, J. J.; Bentz,
D. P.; Livingston, R. A.
Chemistry of Materials, Vol. 10, 397-402, 1998.
spectroscopy; water; hydration; equations
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