WT. OF SAMPLE %OF WATER VOLUME OF PENETRATION WATER 500G 25 125 2 500G 27 135 4.5 500G 30 150 10.5 10. Plot the values for the Penetration of the Needle vs. The volume of the water used. Then, identify the required volume of the water to obtain a penetration of 10 mm. This will be our standard volume of water for making a cement with normal consistency. 11. Use the normal consistency formula, Consistency,% = Volume of Water at 10 +/- 1 mm penetration (mL) Weight of the Cement Sample (g) x 100%