Every concrete grade from M10 to M60 — nominal mix ratios from IS 456 Table 9, IS 10262 design mix ratios, volume and weight batching quantities, ingredients per bag of cement, and a live batch calculator
| Grade | IS 456 Exposure |
NOMINAL MIX — IS 456 Table 9 | DESIGN MIX — IS 10262:2019 (OPC 53, 20mm, 75mm slump) | Site Data | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Ratio C:FA:CA (volume) |
Max w/c | Water / 50kg bag | Adopted w/c | Cement kg/m³ |
Design Ratio C:FA:CA (mass) |
Water L/m³ | Bags/m³ | SP Required? | ||
| M10 | — | 1 : 3 : 6 | 0.60 | 30 L | — | ~167 | Nominal only | 278 | 5.6 | No |
| M15 | — | 1 : 2 : 4 | 0.60 | 30 L | — | ~200 | Nominal only | 278 | 5.6 | No |
| M20 | Mild | 1 : 1.5 : 3 | 0.55 | 27.5 L | 0.55 | 338 | 1 : 2.70 : 2.75 | 186 | 6.8 | No |
| M25 | Moderate | 1 : 1 : 2 | 0.50 | 25 L | 0.50 | 372 | 1 : 2.36 : 2.50 | 186 | 7.4 | No |
| M30 | Severe | Design only | — | — | 0.45 | 331 (SP) | 1 : 2.99 : 2.80 | 149 | 6.6 | Recommended |
| M35 | V.Severe | Design only | — | — | 0.45 | 331 (SP) | 1 : 2.94 : 2.80 | 149 | 6.6 | Strongly rec. |
| M40 | Extreme | Design only | — | — | 0.40 | 373 (SP) | 1 : 2.53 : 2.49 | 149 | 7.5 | ✅ Mandatory |
| M45 | Extreme | Design only | — | — | 0.40 | 375 (SP+SF) | 1 : 2.22 : 2.47 | 150 | 7.5 | ✅ Mandatory |
| M50 | Extreme | Design only | — | — | 0.363 | 413 (SP+SF) | 1 : 1.92 : 2.25 | 150 | 8.3 | ✅ Mandatory |
| M55 | Extreme | Design only | — | — | 0.328 | ~445 (SP+SF) | 1 : 1.66 : 2.09 | 146 | ~8.9 | ✅ Mandatory |
| M60 | Extreme+ | IS 10262 Annex C | — | — | ~0.30 | ~460 (SP+SF+FA) | 1 : 1.45 : 2.0 | ~138 | ~9.2 | ✅ Mandatory |
Design mix ratios by mass: OPC 53, 20mm MSA, 75mm slump, Zone II FA, crushed CA, SSD basis, 1.5% air, jc=0.64, DRBD=1450 kg/m³. SP mixes use PCE 20% WR (W=149 L/m³). Verify all mixes by IS 10262 Cl. 9 trial mixes before production. Above M25: nominal ratios are not permitted — IS 10262 design mix mandatory.
Bars proportional to total batch mass per m³. Higher grades: more cement, less sand per m³ — as the sand reduces to accommodate larger paste volume at lower w/c.
IS 456:2000 Table 9 provides nominal mix proportions — fixed ratios of cement : fine aggregate : coarse aggregate by volume — for grades M5 through M25. These are conservative recipes for small non-critical work where mix design is impractical. They consistently use more cement than a properly designed mix.
| Feature | Volume Batching | Weight Batching |
|---|---|---|
| IS 456 permissibility | M20 and below only (IS 456 Cl. 10.2) | Required for M25 and above |
| Sand bulking error | ±15–40% (dry sand bulks significantly) | None — mass is mass |
| Accuracy | ±5–15% at best | ±1–3% (calibrated equipment) |
| Moisture correction | Practically impossible on site | Standard — IS 10262 Annex A |
| IS 10262 compatibility | Not suitable for design mixes | Required for all IS 10262 design mixes |
| Equipment cost | Minimal (gauge boxes only) | ₹50,000–5,00,000 (weigh batcher) |