| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. TEST DETAILS | |||
| A1 | Test Date Acceptance: DD/MM/YYYY format, same day as concrete pour | Date on which slump test was performed | OK NC NA HOLD |
| A2 | Time of Test Acceptance: HH:MM format, at point of placement or early in pour | Time of slump measurement during concrete supply | OK NC NA HOLD |
| A3 | Pour Location Acceptance: Clear identification (column, beam, slab, footing, etc) | Identify structural element or area being concreted | OK NC NA HOLD |
| A4 | Truck / Batch No Acceptance: Valid batch reference from plant | Mixer truck or batch identification number | OK NC NA HOLD |
| A5 | Grade & Mix Design Reference Acceptance: Grade (M25/M30/etc), approved mix design ID | Target concrete grade and mix design number | OK NC NA HOLD |
| A6 | Ambient Temperature (°C) Acceptance: In range 10-35°C (record exact value) | Air temperature during test | OK NC NA HOLD |
| A7 | Concrete Temperature (°C) Acceptance: Typically 12-32°C (27±3°C ideal), measured with thermometer | Fresh concrete temperature at time of test | OK NC NA HOLD |
| A8 | Transit Time from Plant (minutes) Acceptance: Typically <1.5 hours for RMC, recorded for reference | Time elapsed from batching to slump test | OK NC NA HOLD |
| B. SLUMP TEST RESULTS TABLE | |||
| B1 | Test No / Frequency Acceptance: Minimum 2-3 tests per truck/batch recommended | Sequential test number (Test 1, Test 2, etc) | OK NC NA HOLD |
| B2 | Time of Test (HH:MM) Acceptance: Record for all tests in batch | Exact time each slump test was performed | OK NC NA HOLD |
| B3 | Truck / Batch No Acceptance: Cross-reference to plant records | Batch identification for traceability | OK NC NA HOLD |
| B4 | Target Slump (mm) Acceptance: e.g., 50 mm (low), 100 mm (medium), 150 mm (high) per IS code | Design slump value from approved mix design | OK NC NA HOLD |
| B5 | Measured Slump (mm) - Reading 1 Acceptance: Vertical distance between cone top and collapsed concrete, accuracy ±5 mm | First measurement of slump height (mm) | OK NC NA HOLD |
| B6 | Measured Slump (mm) - Reading 2 Acceptance: Take average of perpendicular readings | Second measurement (perpendicular to first) | OK NC NA HOLD |
| B7 | Average Slump (mm) Acceptance: Value used for acceptance | Average of 2 perpendicular slump measurements | OK NC NA HOLD |
| B8 | Tolerance Verification (±25 mm) Acceptance: Measured ≥ (Target - 25) and ≤ (Target + 25) mm; reject if outside | Check if measured slump within tolerance band | OK NC NA HOLD |
| B9 | Type of Slump Observed Acceptance: True Slump (normal cone collapse) | Shear Slump (asymmetric failure) | Collapse Slump (concrete spreads completely) | Zero Slump (no settlement) | Classify slump type observed during test | OK NC NA HOLD |
| B10 | Result (Accept / Reject) Acceptance: ACCEPT if within ±25 mm tolerance and True Slump; REJECT if Shear/Collapse or out of tolerance | Pass or fail based on tolerance and slump type | OK NC NA HOLD |
| C. WORKABILITY ASSESSMENT | |||
| C1 | Design vs Actual Slump Acceptance: Within ±25 mm; note if consistently high or low | Compare target vs measured slump performance | OK NC NA HOLD |
| C2 | Concrete Consistency Assessment Acceptance: Stiff | Very Plastic | Plastic | Very Workable | Flowable | Match to design intent | Observe and record consistency (very stiff to flowable) | OK NC NA HOLD |
| C3 | Segregation Observed Acceptance: None observed = PASS; Mild / Moderate / Severe = FAIL or NC | Visual assessment for segregation (coarse agg separation) | OK NC NA HOLD |
| C4 | Bleeding Observed Acceptance: None / Slight / Moderate / Heavy — note observation | Check for water on concrete surface (bleed water) | OK NC NA HOLD |
| C5 | Water Addition on Site Acceptance: STRICTLY NOT PERMITTED per IS 456; must be rejected if water added | Confirm NO additional water added to concrete | OK NC NA HOLD |
| C6 | Placement Behavior Notes Acceptance: Easy / Moderate difficulty / Difficult to place; notes on self-consolidation | Record how concrete behaved during placement | OK NC NA HOLD |