Calculate mix proportions for cement, sand, gravel, and water
| Strength (psi) | Ratio (C:S:G) | W/C Ratio | Common Use |
|---|---|---|---|
| 2,500 | 1:3:5 | 0.60 | Footings, mass concrete |
| 3,000 | 1:2.5:4 | 0.55 | Sidewalks, patios |
| 3,500 | 1:2:3 | 0.50 | Driveways, floors |
| 4,000 | 1:1.5:3 | 0.45 | Structural, columns |
| 4,500 | 1:1.5:2.5 | 0.42 | Bridges, precast |
| 5,000+ | 1:1:2 | 0.40 | High-strength applications |