Sampling & Timing
- Sample per ASTM C172; take from middle of load, not first/last discharge.
- Start tests promptly; keep samples out of sun/wind; note time and truck ID.
- Re-mix test portion before slump/air/cylinders as required.
QA / Field Testing
Consistent sampling, correct methods, and tight documentation. Coordinate acceptance criteria with specs/WVDOH.
Also see: Curing · Specs & Mixes
Fresh Concrete Tests
- Slump / Flow: ASTM C143 / C1611 (SCC) — level base, proper rodding/strokes.
- Air content: ASTM C231 (pressure) or C173 (roll-a-meter for lightweight).
- Temperature: ASTM C1064 — measure and record delivery temp.
Cylinders & Handling
- ASTM C31 — make, finish, protect from vibration and moisture loss; initial cure within temp range.
- Transport to the lab carefully; document chain-of-custody; avoid freezing or overheating.
- Breaks per ASTM C39; compare to specified strength and acceptance criteria.
Acceptance & Documentation
- Verify acceptance criteria (ACI 301/WVDOH) for strength/air/slump/tolerance.
- Log admixtures, water additions, ambient/weather, and delays.
- Share results rapidly with the team to adjust operations if needed.
References
- ASTM C172, C143, C1611, C231, C173, C1064, C31, C39
- ACI 301 — Specifications for Concrete Construction
- WVDOH testing/acceptance provisions (project-specific)