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By certification 
Silica Fume NR850 is a densified dry powder microsilica admixture for portland cement concrete and mortars.
Silica Fume NR850 is a pozzolanic material that consists primarily of fine silicon dioxide particles in a non-crystalline form.
Silica Fume NR850 meets the requirements of ASTM C-1240 and contains a minimum of 85% silicon dioxide (SiO2).
Technical Data:
Parameters Standard Value
Silicon Dioxide(SiO2) min 85 %
Loss on Ignition(L.O.I) @ 975 degree celsius max 4 %
Moisture Content max 3 %
Percent Retained On 45micron (325 sieve) max 2 %
Bulk Density 600-700kg/m3
Silica Fume CAS #:69012-64-2
Silica Fume Packing: 900kg/jumbo bags and 25kg small plastic woven bags.
Silica Fume NR850 is a pozzolanic material that consists primarily of fine silicon dioxide particles in a non-crystalline form.
Silica Fume NR850 meets the requirements of ASTM C-1240 and contains a minimum of 85% silicon dioxide (SiO2).
Technical Data:
Parameters Standard Value
Silicon Dioxide(SiO2) min 85 %
Loss on Ignition(L.O.I) @ 975 degree celsius max 4 %
Moisture Content max 3 %
Percent Retained On 45micron (325 sieve) max 2 %
Bulk Density 600-700kg/m3
Silica Fume CAS #:69012-64-2
Silica Fume Packing: 900kg/jumbo bags and 25kg small plastic woven bags.
