| S.No. | Checkpoint | IS Requirement | Status |
|---|---|---|---|
| A. TEST METHODOLOGY | |||
| A1 | Test method and standard compliance Acceptance: Pull-off testing performed with calibrated equipment, minimum 5 samples per 100 m² | Testing shall follow EN 1348 or equivalent pull-off method | OK NC NA HOLD |
| A2 | Sample location selection (representative areas, no edge/corner bias) Acceptance: Samples from at least 3 different areas per section, documented with photos | Random sample selection for objective assessment | OK NC NA HOLD |
| A3 | Equipment calibration (load cell calibration certificate current) Acceptance: Equipment calibrated within 12 months, calibration certificate on file | Accurate measurement of adhesion strength | OK NC NA HOLD |
| A4 | Test timing (minimum 48 hrs after tile laying, maximum 28 days) Acceptance: Testing conducted 48 hrs to 28 days after laying, time recorded | Adhesive must be fully cured for valid testing | OK NC NA HOLD |
| B. TEST RESULTS & ANALYSIS | |||
| B1 | Pull-off load measurement (in MPa or kg/cm²) Acceptance: Minimum bond strength ≥2.0 MPa (≥20 kg/cm²) per tile | Accurate recording of adhesion strength values | OK NC NA HOLD |
| B2 | Failure mode analysis (adhesive, cohesive, substrate failure) Acceptance: Failure in adhesive or at tile-adhesive interface acceptable; cohesive failure in substrate unacceptable | Identify where failure occurred for bond quality assessment | OK NC NA HOLD |
| B3 | Average strength calculation and acceptance criteria Acceptance: Average ≥2.0 MPa, no single value <1.5 MPa, minimum 4 out of 5 samples pass | Statistical analysis of bond strength data | OK NC NA HOLD |
| B4 | Data interpretation and non-conformance evaluation Acceptance: All samples meet minimum criteria or areas identified for rework documented | Assess compliance with strength requirements | OK NC NA HOLD |
| C. OBSERVATIONS & DOCUMENTATION | |||
| C1 | Surface condition observation (moisture, contamination on tile back) Acceptance: Condition noted, any anomalies recorded and photographed | Document factors affecting adhesion quality | OK NC NA HOLD |
| C2 | Adhesive coverage verification (visual inspection of failed sample) Acceptance: Coverage >90% on tile back required; voids or dry spots identified | Assess adequacy of adhesive application | OK NC NA HOLD |
| C3 | Photographic documentation of test procedure and failed samples Acceptance: At least 3 photos per test location showing sample location, setup, and failure | Visual record of testing and failure patterns | OK NC NA HOLD |
| C4 | Environmental conditions during testing (temperature, humidity) Acceptance: Temperature 15-35°C, humidity recorded, unusual conditions noted | Record conditions that may affect results | OK NC NA HOLD |