how much water you will add to the mix, for making 1 m3 of
concrete to achieve strength of mix 20N/mm2 at 28 days.

Answer Posted / fathi abu sabha

20N/MM2 = 200KG/CM2 CMPRESSIVE STRENGHT
THE WATER FOR 200KG/CM2 = 1/2 OF CEMENT QY 1/2* 200KG = 100
LITTERS
FOR 30N/MM2 = 300 KG/CM2 = 1/2*300KG = 150 LITTERS

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