### Conventional grade C20, C25 and C30 concrete mix ratio

There are two methods: one is to use a variety of materials amount per 1 cubic meters, such as cement 300 kg, water 180 kg, sand 690 kg, gravel 1260 kg; the other is that the water cement ratio and cement ratio and concrete content of different materials per unit mass of the cases, such as precedent can be written as: C:S:G=1:2.3:4.2, W/C=0.6.

### Water Cement Ratio of M20 Grade Concrete

2021 12 21 For M20 mix, whose ratio is 1:1.5:3, the weight of cement is 403.20kg, the weight of sand is 672 kgs, water required for it is 201.60 liters. For M25 mix, whose ratio is 1:1:2, the weight of cement is 565.00kgs, the weight of sand is 565.00kgs, water required for it is 282.50liters. For M30 mix, whose ratio is 1:1:3, the weight of cement is 452