ALKALI AGGREGATE REACTIVITY IN DENSE CONCRETES CONTAINING SYNTHETIC OR POROUS NATURAL AGGREGATE

Studies have been made into the relative importance of pore solution dilution, accommodation of gel pressures and potential reactivity of porous aggregate in the suppression of alkali aggregate expansion in concretes containing a pessimum proportion of thames valley sand. The results also indicate that the alkalinity of the pore solution may be a more direct measure of susceptibility to reaction than the na20 equivalent content of the concrete. Slow reactivity in some sintered aggregates has been monitored for up to 10 years and the relatively low expansions are discussed in terms of fluxing impurities in the glassy phases. (Author/TRRL)

  • Availability:
  • Corporate Authors:

    Pergamon Press, Incorporated

    Maxwell House, Fairview Park
    Elmsford, NY  United States  10523
  • Authors:
    • COLLINS, R J
  • Publication Date: 1989-3

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Filing Info

  • Accession Number: 00493468
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Apr 30 1990 12:00AM