SELECTIVITY OF ALKALINE ACTIVATORS FOR THE ACTIVATION OF SLAGS

An increasingly common replacement for portland cement in concrete is ground-granulated blast-furnace slag. Findings from experiments and a review of literature reveal that alkaline activators have selectivity; more simply, various activators have different activation effects on slags from different origins. Analysis of hydration chemistry suggests that selectivity is the result of variation of hydration products and microstructure from various combinations of slag and activator. Selectivity of activators suggests that strength of a blast-furnace slag with NaOH solution is more appropriate as an internal quality control index than a quality evaluation index. To improve the sensitivity of the quality control test, the alkali may be chosen based on an activator-optimization testing rather than specifying an alkali.

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  • Corporate Authors:

    American Society for Testing and Materials

    100 Barr Harbor Drive, P.O. Box C700
    West Conshohocken, PA  United States  19428-2957
  • Authors:
    • Shi, C
    • Day, R L
  • Publication Date: 1996-6

Language

  • English

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Filing Info

  • Accession Number: 00726966
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Oct 26 1996 12:00AM