Air Entrainment Meter
IS 1199 1959 & BS 1881-106
As entrainment of air in limited percentage improves durability of
concrete and very low percentages deteriorate it ,measurement of
air entrapped in freshly mixed concrete becomes important. The use
of chemical additives to increase work ability of concrete in turn
requires an air content check to be made. Air entrainment meters are
used to determine air entrained in freshly mixed concrete by pressure
The apparatus consists of a pressure tight flanged
cylindrical measuring bowl of 0.005 cubic meter capacity for
maximum size of aggregate 38mm. The bowl is fitted with a
removable flanged conical cover assembly with the help of a seal.
The conical cover has an air valve and a petcock for bleeding off the
water. A transparent cylindrical stand pipe which is graduated in air
content is fixed to the conical cover assembly. Pressure is applied to
the specimen with the help of a pressure bulb and the pressure is
recorded on the pressure gauge which is mounted on the stand pipe.
The whole assembly is mounted on a flat base. The instrument is
supplied complete with one each following accessories.
Other Size are also available.
0.007 cubic meter capacity for maximum size of aggregates 38mm,
0.01cubic meter capacity for maximum size of aggregate 75mm.
0.1 cubic meter capacity for maximum size of aggregate 150mm.