| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. FINENESS TEST (Blaine Method) | |||
| A1 | Sample preparation: cement sample dried, weighed, and tested per IS 4031 Part 1 Acceptance: Sample mass: 1.000 ± 0.005 gm; apparatus calibrated; room temp 20-27°C | Cl. 5.1 — Test procedure for fineness | OK NC NA HOLD |
| A2 | Permeability cell filled uniformly; no settling or compaction Acceptance: Sample deposited evenly; density approximately 1.4 g/cm³; uniform distribution | Cl. 5.1.2 — Sample loading method | OK NC NA HOLD |
| A3 | Air flow measurement recorded for fineness calculation Acceptance: Minimum two measurements within 10 second difference; average calculated | Cl. 5.1.3 — Measurement procedure | OK NC NA HOLD |
| A4 | Fineness calculated and compared with IS code limits Acceptance: 33 Grade: min 225 m²/kg; 43/53 Grade: min 225 m²/kg; measured value documented | Cl. 5.1 — Acceptance criteria | OK NC NA HOLD |
| B. NORMAL CONSISTENCY TEST | |||
| B1 | Cement paste prepared with water as per Vicat apparatus standard Acceptance: Cement: water ratio adjusted until rod penetrates to specific depth; mass 400g | Cl. 5.2 — Consistency test procedure | OK NC NA HOLD |
| B2 | Vicat apparatus standardized and plumb; needle or rod centered Acceptance: Apparatus vertically aligned; needle/rod moves freely; dial gauge calibrated | Cl. 5.2.1 — Apparatus setup | OK NC NA HOLD |
| B3 | Consistency measurement: water percentage determined when rod penetrates 33-35 mm Acceptance: Penetration recorded; water % calculated; typically 25-35% for OPC | Cl. 5.2.2 — Endpoint determination | OK NC NA HOLD |
| B4 | Normal consistency percentage documented for use in setting time tests Acceptance: Consistency value recorded with precision ±0.5%; used for all subsequent paste tests | Cl. 5.2 — Documentation requirement | OK NC NA HOLD |
| C. INITIAL & FINAL SETTING TIME TEST | |||
| C1 | Cement paste prepared with normal consistency water and tested per IS 4031 Part 5 Acceptance: Paste mixed for 3-5 min; transferred to Vicat mould; tested at controlled temperature | Cl. 5.3 — Setting time test procedure | OK NC NA HOLD |
| C2 | Initial setting time: Vicat needle penetration measured periodically after water addition Acceptance: Initial set when needle penetrates 33-35 mm mark; typical: 30-90 min for OPC | Cl. 5.3.1 — Initial set endpoint | OK NC NA HOLD |
| C3 | Final setting time: Vicat needle with annular attachment penetration recorded Acceptance: Final set when needle does not penetrate >0.5mm; typical: 2-6 hours for OPC | Cl. 5.3.2 — Final set endpoint | OK NC NA HOLD |
| C4 | Setting time results compared with IS code specification limits Acceptance: 33 Grade OPC: 30-600 min (initial); 43 Grade: 30-600 min; 53 Grade: 30-600 min | Cl. 5.3 — Acceptance criteria | OK NC NA HOLD |