Grade 940 for Concrete

Elkem Microsilica® Grade 940 is a dry silica fume powder.  It is available in two forms: Undensified (U) and Densified (D).  In use, Elkem Microsilica® Grade 940 improves the properties and performance of high performance concrete and specialist mortar formulations.  It acts physically to optimise particle packing of the mixture, and chemically as a highly reactive pozzolan


Available in a range of packaging options:

  • 25 kg paper bags
  • Big bags in various designs & sizes
  • Bulk road tanker

Please contact our representative for more details 

Storage & handling

Elkem Microsilica® Grade 940 should be stored in dry conditions and not exposed to moisture. 

Quality assurance & Quality control 

Elkem Silicon Materials’ Management System for development, processing and supply of Elkem Microsilica® is certified to ISO 9001.  The chemical and physical properties of Elkem Microsilica® are regularly tested.

Chemical and physical properties

SiO2 Minimum 90 %
Loss on Ignition Maximum 3 %
Coarse particles >45µm Maximum 1.5 %*
Bulk Density (U) 200 – 350 kg/m3
Bulk Density (D) 500 – 700 kg/m3

 *Tested on Undensified.
Test methods are available on request.