SPEC OF
NATURAL GYPSUM
天然石膏のスペック
Natural Gypsum (CaSO4 2H2O) quality Specifications
Natural Raw Gypsum Specification:0-50mm
| Specifications | Standard of Analysis | Min | Max |
|---|---|---|---|
| Moisture | ASTM C 471M | 0.10% | 1.00% |
| Combined Water/ Crystal Water | ASTM C 471M | 18.50 % | 20.30 % |
| Aluminium Oxide (Al2O3) | ASTM C 471M | 0.050% | 0.15% |
| Iron Oxide (Fe2O3) | ASTM C 471M | 0.050% | 0.15% |
| Calcium Oxide/Lime (CaO) | ASTM C 471M | 31.00% | 33.0% |
| Magnesium Oxide (MgO) | ASTM C 471M | 0.50% | 2.00% |
| Sulphate (SO3) | ASTM C 471M | 42.00% | 45.10% |
| Cl as Sodium Chloride (NaCl) | ASTM C 471M | 0.005% | 0.01% |
| Silica (SiO2) | ASTM C 471M | 0.30% | 1.00% |
| Purity (CaSO4 2H2O) | ASTM C 471M/IS 1288 | 90.0% | 97.0% |
| pH | By pH Meter | 6 | 8 |
Natural Raw Gypsum Specification:50–100mm or 50-150mm:90%
| Specifications | Standard of Analysis | Min | Max |
|---|---|---|---|
| Moisture | ASTM C 471M | 0.10% | 2.00% |
| Combined Water/ Crystal Water | ASTM C 471M | 19.00% | 20.30% |
| Aluminium Oxide (Al2O3) | ASTM C 471M | 0.050% | 0.15% |
| Iron Oxide (Fe2O3) | ASTM C 471M | 0.050% | 0.15% |
| Calcium Oxide/Lime (CaO) | ASTM C 471M | 31.00% | 33.0% |
| Magnesium Oxide (MgO) | ASTM C 471M | 0.50% | 2.00% |
| Sulphate (SO3) | ASTM C 471M | 42.30% | 45.10% |
| Cl as Sodium Chloride (NaCl) | ASTM C 471M | 0.005% | 0.01% |
| Silica (SiO2) | ASTM C 471M | 0.30% | 1.00% |
| Purity (CaSO4 2H2O) | ASTM C 471M/IS 1288 | 91.0% | 97.0% |
| pH | By pH Meter | 6 | 8 |
| Whiteness | ASTM D 2244-93 | 75% | 90% |