Sikacrete®-950 DP

Densified Silica Fume Powder

Sikacrete®-950 DP is a densified dry powder microsilica admixture for portland cement concrete and mortars. Sikacrete®-950 DP meets the requirements of ASTM C-1240 and contains a minimum of 85 % silicone dioxide (SiO2).

How It Works: Sikacrete®-950 DP is a pozzolanic material that consists primarily of fine silicon dioxide particles in a non-crystalline form. Silica fume particles have a diameter of less than 1μm; about 100 times smaller than the average cement particle.    Pozzolanic action: A chemical reaction takes place between the free lime Ca (OH) 2 in the cement paste and the microsilica particles which results in the formation of additional calcium silicate hydrate (CSH) gel, the glue that holds the concrete constituents together. The formation of this extra binding force within the gel increases the compressive and flexural strength of the concrete.   Void Reduction: The fine particles of Sikacrete®-950 DP fill the tiny voids and capillary pores within the cement matrix and significantly reduce porosity to produce an extremely dense and impermeable concrete.     Advantages: Sikacrete®-950 DP produces concrete that has dramatically increased compressive and flexural strength, which allows greater design flexibility and structural design economies, combined with reduced permeability to increase the service life of the concrete.    
  • Compressive strengths are dramatically increased for high performance concrete.
  • Excellent abrasion and erosion resistance increases concrete durability in high-traffic areas.
  • Permeability is dramatically reduced, which makes microsilica ideal for applications where concrete will be required to resist chemical attack.
  • Resistance to corrosion is increased because concrete is more resistant to water ingress and therefore also to corrosion caused by sulfates and water-borne chlorides such as deicing salts.
  • Decreased permeability gives microsilica concrete excellent freeze-thaw resistance because less water is trapped inside the cement paste.
   Sikacrete®-950 DP does not contain calcium chloride nor any other intentionally added chloride containing ingredients.