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Entrained air - BS 8500 requirements

For freeze-thaw resisting concrete, the minimum specified entrained air content depends on the maximum aggregate size and is shown below. The allowable test result range is also given.


Min. specified air
content %

Max. allowable deviation
on range limit %

Max. aggregate
size (mm)

XF1 to XF4, PAV1, PAV2


40 4.0 -0.5, +5.0
20 4.5 -0.5, +5.0
14 5.5 -0.5, +5.0
10 6.5 -0.5, +5.0

Air content is tested in accordance with BS EN 12350-7


Acknowledgement: The Concrete Society