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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: Amorphous Silica in Siliceous Pozzolans: A Rapid Method for its Determination
Author(s): J. Paya, J. Monzo M. V. Borrachero, A. M. Mellado,
and L. M. Ordonez
Publication: Special Publication
Appears on pages(s): 783-798
Keywords: pozzolan; silica; solvent
Abstract:Different non-aqueous solvents (NAS), such as ethylene glycol, 1,2-propylene glycol and glycerol, were tested in the study of the behavior of NAS/SiOz-rich pozzolans (rice husk ash, RHA, and silica fume, SF). Dissolved SiOa in NAS/pozzolan mixtures was evaluated by several procedures: a) electrical conductivity measurements of the suspension; b) weighing of non-dissolved matter in reflux conditions; and c) titration using barium hydroxide solution. The obtained results were compared to those obtained by the reference method (solubility in boiling KOH solution). A good correlation between data obtained in NAS and the reference method was observed.
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