<abstract xmlns="http://www.w3.org/1999/xhtml"><p>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.</p></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.

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

Norwegian University of Science and Technology

Nordic Concrete Research

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Effect of AEA-SP Dosage Sequence on Air Entrainment in FA Concrete"}

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)...

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

Published Online: Dec 31, 2019

Page range: 1 - 21

Received: May 11, 2019

Accepted: Oct 30, 2019

DOI: https://doi.org/10.2478/ncr-2019-0013

Keywords
Air entrainment, Dosage sequence, Fly ash, Admixtures

© 2019 Andrei Shpak et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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

Published Online: Dec 31, 2019

Page range: 1 - 21

Received: May 11, 2019

Accepted: Oct 30, 2019

DOI: https://doi.org/10.2478/ncr-2019-0013

KeywordsAir entrainment, Dosage sequence, Fly ash, Admixtures

© 2019 Andrei Shpak et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Air entrainment, Dosage sequence, Fly ash, Admixtures