Air Entrainment Meter

The Air Entrainment Meter is used to determine the air content of freshly mixed concrete, an important parameter for concrete exposed to freeze-thaw cycles or where air entrainment is intentionally used to improve workability and durability. Fresh concrete is compacted into a sealed pressure bowl fitted with a calibrated pressure gauge; a known air pressure is applied above a water-filled cavity, and the change in pressure is used to directly read the percentage air content on the calibrated dial (pressure method).

It consists of a pressure-tighted cylindrical measuring bowl, fitted with a removeable manged and a conical cover assembly with a seal in-between. The conical cover has an air valve and a pet cock for bleeding-off the water. A cylindrical stand pipe, which is graduated in per cent air content, is fixed on the conical cover assembly.

Required pressure is applied to the specimen with the help of a pressure bulb. The whole assembly is mounted on a flat base. Each apparatus is supplied complete with a calibrating cylinder, pressure gauge, funnel, trowel and tamping bar.

Air Entrainment Meter, Capacity 0.005 m³ (5 litres), suitable for aggregate size upto 38 mm.

Air Entrainment Meter, Capacity 0.01 m³ (10 litres), suitable for aggregate size upto 75 mm.