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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Monitoring Hydration of Alkali-Activated Slag and Fly Ash
Author(s): H.C. Ezirim and W.J. McCarter
Publication: Special Publication
Appears on pages(s): 821-836
Keywords: calcium hydroxide; capacity; conductivity; fly ash; slag.
Abstract:This paper presents developments in electrical impedance methods to study hydration and reaction kinetics of alkali activated slags and fly ash at room temperature (i.e. 21°C). To highlight the testing methodology, work focuses on monitoring the temporal change in both conductance and capacitance of a typical slag and low-lime fly ash activated with calcium hydroxide. Measurements were taken over time scales extending up to six days hydration. It is also shown that the measured electrical parameters change markedly with frequency of applied electrical field. The latter was found particularly relevant to capacitance measurements.
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