| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. APPARATUS AND CALIBRATION | |||
| A1 | Sand pouring cylinder or core cutter apparatus per IS 2720 Part 28/29 Acceptance: SR: 165 mm dia cylinder + calibrating tray; CC: 100 mm dia × 127 mm long cutter, dolly, rammer | Cl. 3 — Apparatus | OK NC NA HOLD |
| A2 | Sand replacement method — bulk density of sand determined prior to test Acceptance: Calibrated standard sand (passing 1 mm, retained 600 µ); density check every 3 months | Cl. 4 — Sand calibration | OK NC NA HOLD |
| A3 | Mass of sand to fill cone (below valve) determined — used in deduction Acceptance: Cone mass of sand (W2) recorded from calibration tray | Cl. 4 — Cone correction | OK NC NA HOLD |
| A4 | Balance used for mass measurements — accuracy ±1 g; verified current day Acceptance: Balance certificate on file; daily zero check done and recorded | Cl. 3 — Balance | OK NC NA HOLD |
| B. TEST PROCEDURE — SITE EXCAVATION AND SAMPLING | |||
| B1 | Test location prepared: surface levelled and cleaned; tray seated firmly Acceptance: Surface plane; no loose material; tray centred at test point | Cl. 5 — Prep | OK NC NA HOLD |
| B2 | Hole excavated through tray opening (SR method) or core cutter driven into soil (CC method) Acceptance: SR: hole 100 mm deep min; CC: driven by rammer with dolly; full cutter in soil | Cl. 5 — Excavation | OK NC NA HOLD |
| B3 | All excavated soil collected, weighed (W) — no loss of material Acceptance: Excavated mass recorded to ±1 g; no spillage; moisture sample immediately sealed | Cl. 5 — Soil mass | OK NC NA HOLD |
| C. VOLUME DETERMINATION | |||
| C1 | SR: hole filled with calibrated sand from cylinder; mass of sand in hole (W3) measured Acceptance: Sand flows freely into hole; cylinder valve closed after fill; W3 = total – cone mass | Cl. 5 — Volume (SR) | OK NC NA HOLD |
| C2 | SR: volume of hole V = W3 / bulk density of sand Acceptance: Volume computed; consistent with approximate depth and area | Cl. 6 — Calculation | OK NC NA HOLD |
| C3 | CC: volume is the internal volume of cutter (typically ~1000 cm³) — verified annually Acceptance: Internal volume from cutter calibration record; trimmed flush with both ends | Cl. 5 — Volume (CC) | OK NC NA HOLD |