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A deep dive into ASTM C568/C568M classification—comparing Category I (Low-Density), Category II (Medium-Density), and Category III (High-Density ≥ 2,560 kg/m³) limestone for exterior paving and load-bearing facades.
Always specify ASTM C568 Category III (bulk density ≥ 2,560 kg/m³, absorption ≤ 3.0%, compressive strength ≥ 55 MPa) for outdoor pool decks, freeze-thaw climates, and vehicular paving; Tianya Limestone tests at 2,610–2,680 kg/m³ and 95–118 MPa.
A deep dive into ASTM C568/C568M classification—comparing Category I (Low-Density), Category II (Medium-Density), and Category III (High-Density ≥ 2,560 kg/m³) limestone for exterior paving and load-bearing facades. When specifying natural limestone for high-value residential villas, hospitality resorts, or commercial facades, decisions must be anchored in laboratory-verified petrographic and mechanical data rather than generic trade assumptions.
| Benchmark Parameter | Verified Factory & Laboratory Standard | Reference Module |
|---|---|---|
| Petrographic Class | ASTM C568 Category III High-Density Limestone (2,650 kg/m³) | Module 04 |
| Water Absorption & Frost | 0.85% – 1.80% (ASTM C97) · 100 Cycles Passed / F100 (ASTM C666 / GOST 30629) | Module 06 |
| Calibration & Pre-Shipment QC | ±1.0mm CNC Calibration + 3,000 m² Dry-Lay Hall Photo Approval | Module 02 |
| 20GP Container Utilization | 20mm: ~500 m² | 30mm: ~320 m² | 50mm: ~190 m² (27 MT Payload) | Module 05 |
