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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. 0,70 |
| Residue <0,063 mm | % | max. 0,50 |
| Uniformity ratio | % | min. 65 |
| AFS number | / | min. 60 |
| Medium grain size, d50 | mm | 0,19 – 0,23 |
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CHARACTERISTICS OF COATED SAND
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| Strength in hot, 280ºϹ/90sec | MPa | min. 1,20 |
| Peel-back, 200ºϹ /60sec | % | max. 65 |
| Peel-back, 200ºϹ /300sec | % | max. 20 |
| Loss on ignition, 900ºϹ (2h) | % | max. 4,20 |
| Content of nitrogen in coated sand, N | % | max. 0,18 |
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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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