Chemcrete C300 is a range of combined water reducing and air entraining Admixtures for concrete.
The combined effect is varied on a scale of C301 to C309, the last digit denoting the approximate air value achieved in 75mm slump concrete using local cements, (i.e. Chemcrete C305 gives approximately 4-5% air entrainment). However, the combined water reduction means that the loss of strength due to air entrainment is greatly reduced.