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Common Concrete Mix Ratios:
M15 = 1:2:4 (cement:sand:aggregate)
M20 = 1:1.5:3 (cement:sand:aggregate)
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Concrete mix ratios are the proportions of cement, sand, and aggregate used in concrete preparation. Different grades of concrete require different ratios to achieve the desired strength and durability.
The calculator provides standard mix ratios for common concrete grades:
M10: 1 part cement : 3 parts sand : 6 parts aggregate
M15: 1 part cement : 2 parts sand : 4 parts aggregate
M20: 1 part cement : 1.5 parts sand : 3 parts aggregate
M25: 1 part cement : 1 part sand : 2 parts aggregate
Details: Using the correct mix ratio ensures the concrete has the required strength, workability, and durability for its intended application.
Tips: Simply select the concrete grade you need from the dropdown menu and click "Calculate" to see the recommended mix ratio.
Q1: What does M15, M20 etc. mean?
A: The 'M' stands for Mix and the number represents the compressive strength of concrete in N/mm² after 28 days of curing.
Q2: Can I adjust these ratios?
A: These are standard ratios. For special requirements, consult a structural engineer who may adjust ratios based on specific needs.
Q3: How much water should be added?
A: Water-cement ratio typically ranges from 0.4 to 0.6 depending on workability requirements.
Q4: Are these ratios by weight or volume?
A: These ratios are by volume. For weight ratios, you'll need to know the bulk density of each material.
Q5: What if I need a different concrete grade?
A: Higher grades (M30 and above) typically require additional considerations like admixtures and should be designed by professionals.