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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: Alkali-Silica Gel Formation at an Early Age Through Solution
Author(s): A. M. Harrisson, S. P. Varma, N. B. Winter
Publication: Special Publication
Appears on pages(s): 1743-1758
Keywords: age; alkali-aggregate reactions; concrete durability; opal; potassium hydroxides; silica gel; sodium soundness; General
Abstract:A mode of occurrence of alkali-silica gel in a 22-year-old concrete has been interpreted in the light of experiments using Beltane opal as a reactive aggregate in a solution of sodium and potassium hydroxide. These experiments indicate that alkali-silica gel forms from solution as a result of the dissolution of reactive silica. The distribution of alkali-silica gel in the sample of field concrete examined suggests that alkali-silica reaction may occur at an early age in the life of the concrete although the concrete may remain apparently sound for many years.
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