Concrete Pavement Mixture Design and Analysis (MDA): Evaluation of Foam Drainage Test to Measure Air Void Stability in Concrete

(2015) Concrete Pavement Mixture Design and Analysis (MDA): Evaluation of Foam Drainage Test to Measure Air Void Stability in Concrete. Transportation, Department of

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Abstract

The stability of air bubbles in fresh concrete can have a profound influence of the potential durability of the system, because excessive losses during placement and consolidation can compromise the ability of the mixture to resist freezing and thawing. The stability of air void systems developed by some air entraining admixtures (AEAs) could be affected by the presence of some polycarboxylate-based water reducing admixtures (WRAs). The foam drainage test provides a means of measuring the potential stability of air bubbles in a paste. A barrier to acceptance of the test was that there was little investigation of the correlation with field performance. The work reported here was a limited exercise seeking to observe the stability of a range of currently available AEA/WRA combinations in the foam drainage test; then, to take the best and the worst and observe their stabilities on concrete mixtures in the lab. Based on the data collected, the foam drainage test appears to identify stable combinations of AEA and WRA.

Item Type: Departmental Report
Keywords: Admixtures; Air voids, Concrete pavements; Freeze thaw durability, Mix design; Pavement performance; air entraining admixtures; air void stability; concrete mixtures; foam drainage test; water reducing admixtures
Subjects: Transportation > Pavements
Transportation > Pavements > Concrete
Transportation
Transportation > Materials
Transportation > Roads and highways
Transportation > Design and Construction
ID Code: 19401
Deposited By: Leighton Christiansen
Deposited On: 24 Apr 2015 11:28
Last Modified: 24 Apr 2015 11:28
URI: http://publications.iowa.gov/id/eprint/19401