| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. SAMPLE PREPARATION & INITIAL WEIGHING | |||
| A1 | Bricks dried at 105-115°C until constant mass; cooled in desiccator Acceptance: Oven temperature maintained; cooled in desiccator; no water uptake before weighing | Cl. 3 — Drying procedure | OK NC NA HOLD |
| A2 | Dry mass of each brick recorded (Weight D) to 0.1 g precision Acceptance: Balance accurate; 5 bricks tested minimum; mass documented | Cl. 3.1 — Mass recording | OK NC NA HOLD |
| B. WATER IMMERSION AND SATURATION | |||
| B1 | Bricks immersed in clean water at 27±2°C for 24 hours Acceptance: Full immersion 24±0.5 hours; water temperature 27±2°C maintained; clean water used | Cl. 4 — Immersion procedure | OK NC NA HOLD |
| B2 | Excess water wiped from surface with damp cloth; surface-saturated condition achieved Acceptance: Water removed from surface; no dripping water; saturated condition confirmed | Cl. 4.1 — Surface drying | OK NC NA HOLD |
| C. SATURATED MASS DETERMINATION | |||
| C1 | Saturated mass of each brick recorded immediately (Weight S) to 0.1 g precision Acceptance: Weighed within 5 minutes of removal from water; accurate to 0.1 g | Cl. 4.2 — Saturated mass | OK NC NA HOLD |