The ingredient of concrete are mixed in different proportions, either by volume or by weight, the latter being more
precise and scientific. Volume batching of concrete is not allowed by revised IS 456-2000 today and the common method of
expressing the proportions of ingredients in concrete mix is in the form of parts or ratio of cement. The fine aggregate and
coarse aggregate cement being taken as unity. Cubes are cured alternate wetting and drying condition (partially curing ) average
compressive strength of concrete cube 30.60 N/mm2. Which is approximately 60 % of target compressive strength. When cube
are cost with no curing is carried out, the cube are cured in room, the average compressive strength of the cube at 28 days = 22.5
N/mm2 . which approximately 58% of target which do not satisfied the requirement of target of M30 grade concrete , but it will
satisfy the requirement of strength for M15 grade concrete. Therefore if the curing is not carried out site , grade of concrete used
is M30 .
