Weight of 1 cubic METRE concrete grade m20

Volume of dry Concrete is usually 1.54 to 1.57 times Volume of wet concrete. During concreting when the wet concrete is placed, it hardens after initial setting time of 30 mins For 1 cu.m.(assumed) of Concrete work M-20 ratio Sum = 1+1.5+3=5.5 Shrinkage or safety Factor =1.57 So Total volume of wet concrete required is :- 1.57 Cubic Metre Volume of aggregate = (3/5.5) x 1.57 = 0.856 Cubic Metre Volume of sand Require = (1.5/5.5) x 1.57 = 0.471 Cubic Metre Volume of cement = (1/5.5) x 1.57 = 0.285 Cubic Metre = 0.285 x1440 = 411 kg For 1 Cubic Metre of M20 (1:1.5:3) Agregate = 0.856 Cubic Metre Sand = 0.472 Cubic Metre Cement = 8.22 bags.