99.9% Undensified Silica Fume

Low Price White Microsilica for Sale

99.9% Undensified Silica Fume is a micro silica fume with 99.9% SIO₂ content, and the Bulk density is 320kg/m³.

Silica fume is a byproduct of producing silicon metal or ferrosilicon alloys. It consists primarily of amorphous silicon dioxide (SIO₂), its average granule diameter is 0.15~0.20 μm, specific surface area is 15000~20000 m²/kg. Mainly used for high transparency, high resistance to tear silicone rubber, silicone grease, sealed packaging materials such as capacitors. 

Announcements

In the application of high-strength, high abrasion resistance, underwater casting of anti-scattering concrete, etc., the amount of silica fume admixture should not be too low usually accounting for 5%-10% of the cementitious material.

Use Ewende silica fume powder preparation of high-strength, early-strength concrete should be used with high-efficiency water reducing agent, with high-strength concrete should be selected with low air-entraining high-efficiency water reducing agent, depending on the situation can add defoamer.

In ordinary strength, impermeable, highly durable or self-compacting concrete applications, it is appropriate to use a multi-component cementitious material with low silica fume admixture, usually accounting for 2%-5% of the cementitious material.

The addition of silica fume powder needs to extend the mixing time, can not be mixed in wet concrete after mixing, it is recommended to extend the mixing time of 30 seconds than ordinary concrete to ensure uniform mixing.

Plastic shrinkage crack sensitive, better maintenance method is: spray concrete has not yet set, spraying curing agent maintenance; concrete hardening, the use of maintenance film, covered with wet sacks or plastic film.

99.9% Undensified Silica Fume Basic Attributes

Very low permeability to chloride and water intrusion.
Extremely high resistivity (20 to 100 times greater than normal concrete).
Increased abrasion resistance of decks, floors, highways and marine structures.
Excellent resistance to chemical attack by chlorides, acids, nitrates and sulfates.

99.9% Undensified Silica Fume Parameters

99.9% Undensified Silica Fume Application

The characteristics of microsilica are mainly manifested in two aspects: volcanic ash activity and micro-particle nature. Therefore, microsilica is often used as a filler and modified additive.

Used in high-performance concrete, it enhances concrete strength, improves performance, and extends concrete lifespan.

Used in refractory materials, it enhances fluidity, reduces water usage, and improves product strength and durability.

Used in dry mortar and grout, it increases early-stage strength.

Used in wear-resistant flooring, it enhances flowability and increases abrasion resistance.

Used in paints, coatings, resins, rubber, and other polymer materials as a filler.