Concrete Mix Design
Design concrete mixes for M10 to M40 grades.
Mix ratio (C : FA : CA)
1 : 2.26 : 2.55
w/c = 0.5 · Target fck = 26.5 N/mm²
Quantities per 1 m³ of concrete
| Material | Per m³ | For 1 m³ |
|---|---|---|
| Cement (OPC43) | 372 kg | 372 kg |
| Water | 186 litres | 186 litres |
| Fine aggregate (sand) | 842 kg | 842 kg |
| Coarse aggregate | 949 kg | 949 kg |
Based on IS 10262:2019 mix design procedure. Actual quantities should be confirmed with laboratory trial mixes and adjusted for site aggregate properties. Minimum cement content per IS 456 for mild exposure is enforced.
IS 10262 concrete mix design
Calculate mix proportions for M10 to M40 grade concrete. Select grade, exposure condition, aggregate size, and target slump to get cement, water, and aggregate quantities.
Frequently asked questions
- What is IS 10262?
- IS 10262 is the Indian Standard code for concrete mix proportioning. The 2019 revision provides a systematic approach to determine water-cement ratio, water content, and aggregate proportions for target compressive strength.
- What is the water-cement ratio for M20 concrete?
- For M20 concrete per IS 10262, the maximum free water-cement ratio is 0.50. Lower w/c ratios give higher strength but reduce workability.
- What is the target mean strength in mix design?
- Target mean strength = Characteristic compressive strength + 1.65 × standard deviation. For M20 with standard deviation 4 N/mm², target fck = 20 + 6.6 = 26.6 N/mm².
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