DETERMINATION OF COMPRESSIVE STRENGTH OF
DETERMINATION OF COMPRESSIVE STRENGTH OF CEMENT. ( IS : 4031 – Part – 6 ) Object : Determination of the compressive strength of standard cement mortar cubes compacted by means of a standard vibration machine. Apparatus : Vibration machine, cube moulds of size 7.06 cms(confirming to IS : 4031 – 1968), and Standard Sand to be used in the test shall be confirm to IS : 650 – 1966. Procedure : Mix Proportions and Mixing : Clean appliances shall be used for mixing and the temperature of the water and that of the test room at the time when the above operations are being performed shall be 27 0 +/- 2 0 C. Place in a container a mixture of cement and standard sand in the proportion of 1 : 3 by weight; mix it dry, with a trowel for one minute and then with water until the mixture is of uniform colour. The quantity of water to be used shall be as specified below. In any event, it should not take more than 4 minutes to obtain uniform coloured mix. If it exceeds 4 minutes, the m...