Acoustophoretic Characterization of Cement Suspensions
Robert J. Flatt, Chiara C. Ferraris
Acoustophoresis 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)The measurement of the zeta potential of cement paste with and without HRWRA can be measured using electrophoresis. This method requires the dilution of the cement paste to a solid content of 100 mg/L to 200 mg/L. Such dilutions modify the ion/particle interaction of the cement particles, and are not representative of a typical cement paste concentration. The technique of acoustophoresis allows the measurement more concentrate suspensions, up to 25 % solid by volume. 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 ongoing hydration reactions. Other benefits of the technique will be discussed.
and Ferraris, C.
Acoustophoretic Characterization of Cement Suspensions, Materials and Structures, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=860302
(Accessed May 30, 2023)