| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. MTC IDENTIFICATION AND AUTHENTICITY | |||
| A1 | Verify MTC on manufacturer letterhead with unique number and authorized signatory Acceptance: Letterhead, cert no., date, signatory, seal all present; MTC matches consignment | Cl. 9 — Certification | OK NC NA HOLD |
| A2 | Verify batch number on MTC matches container labels and delivery challan Acceptance: Batch/lot ID consistent across MTC, container label, gate pass, challan | Cl. 9 — Traceability | OK NC NA HOLD |
| A3 | Verify admixture type declared on MTC matches IS 9103 Cl. 4 classification Acceptance: Type A to G identified; matches intended site use (e.g., Type F/G for high-grade concrete) | Cl. 4 — Classification | OK NC NA HOLD |
| B. CHEMICAL / COMPOSITION VERIFICATION | |||
| B1 | Verify chloride content reported on MTC Acceptance: Cl⁻ ≤ 0.2% by mass of admixture (for RCC); prestressed concrete needs ≤ 0.02% typical | Table 1 — Chemical limits | OK NC NA HOLD |
| B2 | Verify dry residue (% solids content) and relative density on MTC Acceptance: Dry residue within ±5% of manufacturer's declared value; relative density within tolerance | Cl. 7 — Uniformity | OK NC NA HOLD |
| B3 | Verify pH value and ash content reported on MTC Acceptance: pH within ±1 of declared value; ash content within ±1% of declared | Table 1 — Physical | OK NC NA HOLD |
| C. PERFORMANCE PROPERTIES (FRESH & HARDENED) | |||
| C1 | Verify water reduction (%) reported on MTC for plasticizer / superplasticizer types Acceptance: Type C: water reduction ≥ 5%; Type F (SP): ≥ 12%; reported value meets requirement | Table 2 — Performance | OK NC NA HOLD |
| C2 | Verify time of setting (initial/final) deviations per IS 9103 Table 2 Acceptance: Accelerator: initial set reduced ≥ 1 hr; Retarder: delayed by 1-3.5 hr; within limits | Table 2 — Setting | OK NC NA HOLD |
| C3 | Verify compressive strength of test concrete at 7 & 28 days (relative to control) Acceptance: Type C/F: 28-day strength ≥ 110% of control; other types per IS 9103 Table 2 | Table 2 — Strength | OK NC NA HOLD |
| C4 | Verify bleeding test result (fresh concrete) on MTC per IS 1199 Acceptance: Bleeding water ≤ 110% of control batch; no excessive segregation | IS 1199 — Bleeding | OK NC NA HOLD |
| C5 | Verify slump / flow (workability) improvement reported on MTC Acceptance: Slump increase or flow improvement as declared; demonstrated on trial mix | IS 1199 — Slump | OK NC NA HOLD |