Different raw materials, different strength grades, different slump and different performance requirements of the concrete are different, what specific ratio is generally used to send the concrete raw materials to professional testing institutions for testing and issuing the required ratio. Below are a few of the very common concrete ratios.
Common Concrete Ratios
C25 ratio: cement: sand; stone: water = 1:1.40:2.85:0.47 (weight ratio) material dosage (kg/m3): cement: 415kg; sand: 583kg; stone: 1184kg; water: 195kg
Mixing ratio for C30: cement: sand: stone: water = 1:1.18:2.63:0.41 (weight ratio) Amount of material (kg/m3): cement: 459kg; sand: 542kg; stone: 1206kg water: 188kg
C35 ratio (must use 42.5 grade cement or above): cement: sand; stone: water = 1:1.37:2.78:0.46 (weight ratio): cement: 424kg; sand: 581kg; stone: 1179kg water: 195kg
C40 mix ratio (must use 42.5 grade cement or above): cement: sand; stone: water = 1: 1.08: 2.41: 0.40 (weight ratio) material dosage (kg/m3): cement: 488kg; sand: 528kg; stone: 1176kg water: 195kg
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