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GRAIN SIZE DISTRIBUTION AND PHYSICAL CHARACTERISTICS OF COATED SAND
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| Measure unit | Value | |
| Residue > 0,500 mm | % | max. 3,0 |
| Residue <0,125 mm | % | max. 2,5 |
| Uniformity ratio | % | min. 70 |
| AFS number | / | 50 – 60 |
| Medium grain size, d50 | mm | 0,22 – 0,27 |
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CHARACTERISTICS OF COATED SAND
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| Strength in hot,280ºϹ/90sec | MPa | min. 0,60 |
| Peel-back, 200ºϹ /300sec | % | max. 20 |
| Loss on ignition, 900ºϹ (2h) | % | 1,80 – 2,50 |
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CHEMICAL ANALYSIS OF BASIC SAND
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| SiO2 | % | min.98,50 |
| Al2O3 | % | max.0,80 |
| Fe2O3 | % | max.0,05 |
| Moisture content | % | max.0,50 |
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