Mainly used in the cement or admixture concrete, wear resistant ,anti-eroding, freezing resistant,anti-osmotic,and also used in the Fireproof Materials and the ceramic products making to improve its density and durability.

Item	A	B		C
	SF95	SF93	SF90	SF88	SF85	SF80	SF70
SiO2,%≥	96.0	93.0	90.0	88.0	85.0	80.0	70
Al2O3,%≤	1.0	1.0	1.5	-	-	-	-
Fe2O3,%≤	1.0	1.0	2.0	-	-	-	-
CaO+MgO,%≤	1.0	1.5	2.0	-	-	-	-
K2O+Na2O,%≤	1.0	1.5	2.0	-	-	-	-
C,%≤	1.0	2.0	2.0	2.5	-	-	-
Loss on ignition,LOI,%≤	1.0	3.0	3.0	4.0	-	-	-
PH value	4.5-6.5	4.5-7.5	4.5-7.5	4.5-8.5	-	-	-
Retained on 45 micro sieve,%≤	3.0	3.0	5.0	8.0	-	-	-
Specific surface , (BET-m2/gram)≥	15				-	-	-
Moisture,%≤	1.0	2.0	2.5	3.0	3.0	3.0	3.0
Bulk specific gravity,(kg/m3) ≤	700	700	700	700	700	700	700