Published: 2020-06-30

Characteristics of concrete mix air-entrainment applying the sequential pressure method

Kinga Dziedzic , Mariusz Dąbrowski , Aneta Antolik , Adam Glinicki

Abstract

The purpose of introducing air into the concrete mix is to increase the freeze-thaw and scaling resistance of hardened concrete. The utility of the sequential pressure method (Super Air Meter - SAM) for assessment of the air entrainment quality was verified by comparing the results obtained with this method with the results of the air-void analysis of hardened concrete. The results of the tests carried out on mixes designed and produced at a laboratory and the mixes produced on an industrial scale during expressway construction are considered. Furthermore, the relationships between the SAM number and the micro air-void content A300 in hardened concrete and the freeze-thaw and de-icing salt resistance are analysed as part of this research. A clear co-relation between the SAM number, a parameter that characterises the air-entrainment of the concrete mix, and the microvoid content has been demonstrated.

Keywords:

air-entrainment, air-void parameters, concrete, freeze-thaw resistance, microvoid content, sequential pressure method, surface scaling.

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Dziedzic, K., Dąbrowski, M., Antolik, A., & Glinicki, A. (2020). Characteristics of concrete mix air-entrainment applying the sequential pressure method. Roads and Bridges - Drogi I Mosty, 19(2), 107–118. https://doi.org/10.7409/rabdim.020.007

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