Influence of Air Entrainment Content on Strength and Frost Resistance of Concrete

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Title: Influence of Air Entrainment Content on Strength and Frost Resistance of Concrete

Author(s): O. I. Matveeva and G. D. Fedorova

Publication: Special Publication

Volume: 326

Issue:

Appears on pages(s): 16.1-16.8

Keywords: air, concrete, entrainment, frost, mix, strength, resistance, standard, volume

Date: 8/10/2018

Abstract:

According to GOST 26633-2015 the air entrainment content in the concrete mix has to be not less than 4% for concretes with mark on frost resistance F1200 (F2100) and above. The standard places particularly high demands on this indicator to the concrete of the structural layers of roads and airfields, where the volume of air entrainment in a concrete mix for a single layer or upper layer of the duplex coating shall be 5-7% and for the bottom layer of the duplex coating is about 4-6%.

Thus, due to the introduction of the updated normative document outside of the application were of a concrete mix with a volume of air involved 3-4%, which previously was widely used. At the same time according to different researching the amount of air involved from 2.8 to 3.7% provided by mark on frost resistance of concrete F1300 above.

The article presents experimental data confirming the validity of using concrete mixtures with lower air contents involved (2-4%) than it is accepted the standard. The volume of air entrainment of concrete mix is necessary to expand from 2 to 7%. This will save the cement consumption.