| S.No. | Field / Checkpoint | Reference | Status |
|---|---|---|---|
| A. SAMPLE | |||
| A1 | Sample location + depth + soil description Acceptance: Per source | Per bore log | OK NC NA |
| A2 | Sample preparation — natural / compacted / soaked Acceptance: Per method | Per IS 2720 Pt 16 | OK NC NA |
| B. TEST EXECUTION | |||
| B1 | Sample compaction — Proctor / Modified Proctor + MDD + OMC Acceptance: Per code | Per IS 2720 Pt 7 / 8 | OK NC NA |
| B2 | 4-day soaking with surcharge (for soaked CBR) Acceptance: Per code | Per IS 2720 Pt 16 | OK NC NA |
| B3 | Penetration test — 1.25 mm/min Acceptance: Per device | Per IS 2720 Pt 16 | OK NC NA |
| B4 | Load at 2.5mm + 5mm penetration recorded Acceptance: Logged | Per code | OK NC NA |
| C. CBR CALCULATION | |||
| C1 | CBR % = (Test load / Standard load) × 100 Acceptance: Per IS 2720 Pt 16 | Standard 1370 kg @ 2.5mm; 2055 kg @ 5mm | OK NC NA |
| C2 | CBR @ 2.5mm and 5mm — higher value reported Acceptance: Both reported | Per code | OK NC NA |
| C3 | Soaked CBR vs unsoaked CBR — significant difference for clayey soils Acceptance: Both reported if applicable | Per project | OK NC NA |