Acoustophoretic Characterization of Cement Suspensions.
Acoustophoretic Characterization of Cement Suspensions.
(2477 K)
Flatt, R. J.; Ferraris, C. F.
Materials and Structures, Vol. 35, 541-549, November
2002.
Keywords:
cements; cement paste; acoustophoresis; zeta potential
Abstract:
Acoustophoretic has been used to study the evolution of
the surface potential of hydrating cement suspensions
because it is potentially capable of measuring zeta
potentials of cement suspensions at concentrations high
enough not to modify ion/particle interactions, which is
not the case for most other methods. Measurements were
performed using cement with and without addition of
high-range water reducing admixture (HRWRA). In this
paper it will be shown that quantitative determination
of the potential is rendered difficult by the large size
of cement particles as well as by ongoining hydration
reactions. Other benefits of the technique will be
discussed.
Building and Fire Research Laboratory
National Institute of Standards and Technology
Gaithersburg, MD 20899