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GRAIN SIZE DISTRIBUTION AND PHYSICAL CHARACTERISTICS
Measure unit Value
Residue > 2,000 mm % max.   8,0
Residue < 0,355 mm % max. 20,0
Medium grain size, d50 mm 0,65 – 0,95
Moisture content % max.  6,0
pH-value / 7,0±0,5
CHEMICAL ANALYSIS
SiO2 % min.98,50
Al2O3 % max.0,60
Fe2O3 % max.0,040
Loss on ignition % max.0,30