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GRAIN SIZE DISTRIBUTION AND PHYSICAL CHARACTERISTICS
Measure unit Value
Residue > 0,710 mm % max.   1,0
Residue < 0,125 mm % max. 10,0
Medium grain size, d50 mm 0,25 – 0,40
Moisture content % max.  0,5
pH-value / 7,8±0,1
CHEMICAL ANALYSIS
SiO2 % min.98,50
Al2O3 % max.0,50
Fe2O3 % max.0,045
Loss on ignition % max.0,20