10+ CONCRETE MIX RULES OF THUMB YOU SHOULD KNOW

Rules of Thumb on Concrete Mix

Adding 4 liters of water to 1 cubic meter of freshly mixed concrete will:

1. Increase slump about 25 mm
2. Decrease compressive strength about 1.5 to 2.0 N/mm²
3. Increase shrinkage potential about 10%
4. Waste as much as ¼ bag of cement

If Freshly Mixed Concrete Temperature Increases 1 degree Celsius:

1. About 4 liters of water per cubic meter maintains equal slump
2. Air content decreases about 1%
3. Compressive strength decreases about 1.0 to 1.5 N/mm²

If The Air Content of Freshly Mixed Concrete:

1. Increases 1%, then compressive strength decreases about 5%
2. Decreases 1%, then yield will decrease about 0.03 cubic meter per 1 cubic meter
3. Decreases 1%, then slump decreases about 12.5 mm
4. Decreases 1%, then durability decreases about 10%