EN
Micro silica ,also called silica fume or micro silica, is a byproduct of production silicon metal or ferrosilicon alloys. Silicon metal and alloys are produced in electric furnaces.The raw materials are quartz,coal and woodchips.The smoke that results from furnace operation is collected and sold as silica fume, silica fume consists primarily of amorphous(non-crystalline) silicon dioxide(SiO2),its average granule diameter is 0.15~0.20um,specific surface area is 15000~20000m2/kg,and it has extremely strong surface active.
Chemical &Physical Analysis |
ASTM C1240-11 |
EN 13263:2005 |
/ |
Spec. Frequency |
Spec. Frequency |
SiO2 (%) |
>92.0 300MT |
>92.0 Weekly |
So3 (%) |
/ |
<3.0 Weekly |
Cl (%) |
/ |
<0.3 Weekly |
Free CaO (%) |
/ |
<1.0 Weekly |
Free Si (%) |
/ |
<0.4 Monthly |
Alkalies(as equivalent Na2O %) |
Report 300MT |
/ |
Moisture(%) |
<1.0 300MT |
/ |
Loss on Ignition,LOI(%) |
<4.0 300MT |
<4.0 Weekly |
Specific surface(BET -M2/GRAM)
|
>18 2200MT/3 months |
15-35 Monthly |
Bulk density(kg/m3) |
Report 300MT |
/ |
Pozz.Activity Index(%) - 7 days accelerated curing |
>110 2200MT/3 months |
/ |
Pozz.Activity Index(%) - 28 days accelerated curing |
/ |
>100 Monthly |
Retained on 45 micron sieve (%) |
<10 3 00MT |
|
Variation from avg.retained on 45 micron (%) |
<2 avg.of last 10 tests |
|
Density(kg/m3)
|
Report 300MT |
1.Packing: Net 25kg PP bag or 550kg Jumbo bag
2.Delivery time:3-7 working days after deposit
3.We have full stock and can deliver within short time.
