Material Recipes & Design Mixes
5000 psi Concrete Design Mix (≈35 MPa)
Typical per-m³ quantities for 5000 psi concrete for transfer slabs, high-rise columns and post-tensioned members. Indicative trial-mix starting point only. Final proportions must come from a lab trial mix (ACI 211.1) using your actual cement, sand and aggregate, approved by the consultant.
Reference standards: ACI 211.1, ACI 318, ASTM C494
| Material | Per m³ | Notes |
|---|---|---|
| Cement (OPC) | 430 kg (8.6 bags) | Grade 42.5/52.5 |
| Water | 172 L | w/c ≈ 0.40 |
| Sand | 690 kg | |
| Coarse aggregate 20/10 mm | 1,070 kg | Blend 60/40 |
| Superplasticizer | 1.0–1.2% of cement | PCE type |
Mixing & application
- Get cement, sand, aggregate and admixture tested and approved before the trial for 5000 psi.
- Correct the water for aggregate moisture and absorption on the day of mixing.
- Batch by weight: aggregate, sand, cement, then 80% of water, admixture, remaining water.
- Mix in a drum or batching plant for at least 2 minutes until uniform.
- Check slump (target 125–150 mm) and temperature at the point of placing.
- Cast 6 cylinders (150×300 mm) per trial; test 3 at 7 days and 3 at 28 days.
- Target mean strength f'cr = f'c + 1.34s or f'c + 8.3 MPa when no history exists; adjust and repeat if short.
Acceptance criteria
- No single cylinder below f'c − 3.5 MPa.
- Average of 3 consecutive tests ≥ 34.5 MPa.
Health & safety
- Wear PPE: helmet, safety shoes, gloves and eye protection.
FAQs
What is the 5000 psi Concrete Design Mix (≈35 MPa) used for?
Typical per-m³ quantities for 5000 psi concrete for transfer slabs, high-rise columns and post-tensioned members. Indicative trial-mix starting point only. Final proportions must come from a lab trial mix (ACI 211.1) using your actual cement, sand and aggregate, approved by the consultant.
Which standard does it follow?
It is based on ACI 211.1, ACI 318, ASTM C494. Always follow your project specification where it differs.
Can I print or submit this?
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General guidance only, not engineering advice. Project specifications, approved drawings, manufacturer data sheets and your consultant's instructions take priority. See our Policy. This document was generated using CM PRO. Powered by CM PRO.