Microsilica 925

Elkem Microsilica® 925 is a key ingredient in low and ultra-low cement castables. It is highly reactive during sintering, which leads to improved ceramic bonding at reduced firing temperatures. The grade is used in mortars, gunning mixes and other shaped and unshaped materials
Only for Asia and Oceania

General

  • Improved flow – easier to cast
  • Improved particle packing - denser castables
  • Gelification (coagulation) in gunning mixes
  • Improved hot-strength properties

Application

  • Low and ultra-low cement castables
  • Castables, mortars, gunning mixes and other shaped and unshaped materials

Packing

The product is available in 25 kg or 20 kg small bags. Please contact us for more details.

Storage conditions

Store in the original packaging (or re-seal opened packages) under dry conditions above 0°C.

Chemical analysis (weight %)
ElementUnitSpec
SiO2   % min  92.0
H2O*  % max   1.5

Physical data
PropertiesUnitSpec
Loss on ignition %  max  3.0
Coarse particles >45µm  %  max  2.0
Bulk density   kg/m3  250 - 380

* When packed

Test methods

Test methods are available upon request