92% Undensified Silica Fume OR Microsilica 92U is a pozzolanic material that consists primarily of fine silicon dioxide particles in a non-crystalline form, the min silicon dioxide (SiO2) is 92%. Our 92% undensified microsilica is strictly complied with ASTM C-1240 silica fume standard. Microsilica 92U is an undensified dry powder microsilica silica fume admixture for Portland cement concrete and mortars.
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92% Undensified Silica Fume Has The Following Features:
● Lowers concrete permeability.
● Significantly increases concrete durability.
● Increases ultimate strength gain.
● Beneficial in all types of high strength concrete applications.
● Improves bond strength to steel.
● Significantly reduces alkali-silica reactivity.
● Provides excellent resistance to sulfate or seawater attack.
● Reduces steel corrosion.
● Improves freeze/thaw durability of concrete.
92% Undensified Silica Fume
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Analysis/ Properties | Limits |
SiO2 | Silicon Dioxid Amorphous | Min | 92% |
C | Carbon | Max | 2.00% |
Fe2O3 | Iron Oxide | Max | 1.00% |
Al2O3 | Aluminium Oxide | Max | 2.00% |
CaO | Calcium Oxide | Max | 1.20% |
MgO | Magnesium Oxide | Max | 0.50% |
K2O | Potassium Oxide | Max | 1.50% |
Na2O | Sodium Oxide | Max | 0.50% |
H2O | Moisture, As Packed | Max | 1.00% |
Loss on Ignition At 975 C | Max | 3.00% |
Coarse Particles >45µm (325Mesh) | Max | 1.00% |
PH Value(Fresh) | 4.5-7.5 |
Bulk Density(As Packed) | 200-350kg/m3 U |
(1). 92% Undensified Silica Fume Used In Concrete
● Increacing strength
● Increasing density
● Frost resistance
● Early strength
● Abrasion resistance performance, anti-cavitations
(2). 92% Undensified Silica Fume For Cement
● Strengthens the fibre cement product.
● Increases the packing density of the cement matrix.
● Thereby enhance the durability of the fibre cement product.
● Enhances the plasticity of the fresh mix.
● Increases the bending strength of fibre reinforced cement
(3). 92% Undensified Silica Fume For Refractory
● Instead of aluminum oxide to be used as refractory material
● As additive in amorphous and shappely refractory products, greatly improved products strength and high temperature performance.
● As casting combination accelerators in integral teeming ladle
● Agglomerating agent, agglutinant, accelerator and additive in other refractory products..
(4). Other Applications Of 92% Undensified Microsilica
● Rubber industry
● Anti-caking industry
● Pellet binder
● Waterglass industry
● Shotcrete
● Self-Compacting Concrete
● Mining & Tunnelling.
● High rise buildings.
● For producing all concrete products including readymix concrete.
● Motorways, bridges & dams etc