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Effect of AEA-SP Dosage Sequence on Air Entrainment in FA Concrete

Author(s): (Ph.D. candidate Norwegian University of Science and Technology , Richard Birkelands vei 1a, NO- 7034 Trondheim)
(M.Sc., Ph.D., professor Norwegian University of Science and Technology , Richard Birkelands vei 1a, NO- 7034 Trondheim)
Medium: journal article
Language(s): English
Published in: Nordic Concrete Research, , n. 2, v. 61
Page(s): 1-21
DOI: 10.2478/ncr-2019-0013
Abstract:

Laboratory measurements show that varying the dosage sequence of air-entraining agent and co-polymer in the mix (SP added before, after or together with AEA) greatly affects air entrainment in fresh and hardened fly ash concrete. Image analysis shows a somewhat lower specific surface when SP is added together with AEA. Foam Index measurements on the same binder materials, admixtures, and dosage sequences were therefore found less useful for studying the effect of admixture combinations. Obtaining a certain air content using the experience with AEA-SP dosage was found to be an untrivial task if there is a lack of parameter control. Finally, examples of successful mixing procedure for air entrainment in a series of high-volume fly ash concrete are shown.

Structurae cannot make the full text of this publication available at this time. The full text can be accessed through the publisher via the DOI: 10.2478/ncr-2019-0013.
  • About this
    data sheet
  • Reference-ID
    10705844
  • Published on:
    19/02/2023
  • Last updated on:
    19/02/2023
 
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