Light gray microsilica powder containing about 96% – 94% (Sio2) is to reinforce the mechanical strength, density, increased durability against Ice and freezing cycles and reduce the permeability of concrete in construction is increasing, pozzolanic activity index of 117 (7 days) – higher results in tests 7 and 28 day compressive strength of concrete.
Some of light grey microsilica technical properties:
SiO2(Silicon Dioxide): 94–96%
Fe2O3(Iron Oxide): < 1.00 %
Al2O3(Aluminium Oxide): < 1.00 %
CaO(Calcium Oxide): < 0.50 %
MgO(Magnesium Oxide): Max. 0.50%
K2O(Potassium Oxide): Max. 1.00%
Na2O(Sodium Oxide):Max. 0.40%
Loss on Ignition: 2.93%
Undensified Silica Fume (320-360kg/m3)
Densified Silica Fume (630-680 kg/m3)
Note: The above specifications is for reference only some elements can be controlled as per your requirements
Properties and Effects:
Add to microsilica hydro soluble mixture of calcium oxide is released in its active SiO2 capillary pores of concrete to produce insoluble calcium silicate composition and crystal structure and the density of the cement paste and concrete strength.
Silica fume can be added to the 7 to 12 % by weight of cement concrete (due to the increased strength of the concrete will be replaced with the same amount of cement).
Note: due to the adsorption of ultra- micro and hold down the ratio cement is recommended to always use the lubricant . Otherwise cracked concrete is concrete and reduction of congestion.