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85% Densified Silica Fume

Place of Origin: China Color: Grey
Existing Form: Powder SiO2: ≥85.0%
Bulk Density: 550-700kg/m3 Specific Surface: 15-27m2/g
Package: 25kg/ plastic bag, 950kg/ jumbo bag, 1000kg/ jumbo bag Application: Large-scale concrete engineering, mortar, floor, pipe, pile etc.
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Densified Silica Fume is the most revolutionary concrete additive to have been developed in recent times. Densified microsilica fume, with twice the bulk density, provides many benefits. It is dustless, uniform, smooth, free of lumps and flows readily for bulk handling applications.

Silica Fume Properties

● Silica fume, also known as microsilica is an amorphous non-crystalline polymorph of silicon dioxide. It  is an ultrafine powder collected as a by-product of the silicon and ferrosilicon alloy production and consists of spherical particles with an average particle diameter 0.1-0.15um. Specific surface area is 15-27m2/g, and it has extremely strong surface active, can be widely used in concrete, grouting and mortar, refractory materials, ceramics and other fields.

● 85% Silica Fume is a densified grey or black color dry powder, microsilica admixture for portland cement concrete and mortars.

● 85% Densified Silica Fume is a pozzolanic material that consists primarily of fine silicon dioxide particles in a non-crystalline form.

● 85% Densified Microsilica Complied with ASTM C1240 silica fume standard. and contains a minimum of  85% silicon dioxide (SiO2)

Tags: 85% Densified Microsilica, 85% Densified Silica Fume,  Densified Silica Fume Grade 85, Densified Microsilica Grade 85, Concrete Silica Fume, 85% Condensed silica fume, Silica Fume Cement, Silica Fume Concrete Mix Design.

Silica Fume Concrete Mix Design- Silica Fume Cement

● Silica fume (microsilica) is a byproduct of producing silicon metal or ferrosilicon alloys. One of the most important uses for micro silica fume is in concrete. Because of its physical and chemical properties, it is a very reactive pozzolan. Concrete with silica fume will have very high strength and can be very durable. Silica fume is available for concrete admixtures suppliers and, it's simply added during concrete production.

● Because of fine particles, large surface area, and the high SiO2 content, silica fume is usually used as a mineral admixture in concrete. Silica-fume concrete with a low water content is highly resistant to penetration by chloride ions. More and more transportation agencies are using silica fume in their concrete for construction of new bridges or rehabilitation of existing structures.

● Silica fume for use in concrete is available in wet or dry forms. It is usually added during concrete production at a concrete plant. Silica fume-concrete has been successfully produced in both central-mix and dry-batch plants. 

85% Microsilica ( Silica Fume )
Chemical & Physical Analysis Chemical & Physical AnalysisASTM C1240 - 03EN 13263 : 2005
SiO2 (%)> 85.0400 MT> 85Weekly
SO3 (%)

< 2.0Weekly
Cl (%)

< 0.3Weekly
Free CaO (%)

< 1.0Weekly
Free Si (%)

< 0.4Monthly
Alkalies (As Equivalent Na2O. %)Report400 MT

Moisture (%)< 3.0400 MT

Loss On Ignition. LOI (%)< 6.0400 MT< 4.0Weekly
Specific Surface (BET - m2/gram)> 153200 MT/ 3 Months> 15 & <35Monthly
Bulk Density (kg/m3)Report400 MT

Pozz. Activity Index (%) - 7 Days 

Accelerated Curing

> 1053200 MT/ 3 Months

Pozz. Activity Index (%) - 28 days 

Normal curing

> 100Monthly
Retained On 45 Micron Sieve (%)< 10400 MT

Variation From Avg. Retained On 45 

Micron (%-points)

< 5Avg. Of Last 10 Tests

Density (kg/m3)Report400MT

Silica Fume Used In Concrete ( Silica Fume  Concret Admicture)

● Increacing strength

● Increasing density

● Frost resistance

● Early strength

● Abrasion resistance performance, anti-cavitations


Silica Fume In Cement ( Silica Fume Cement Admixture )

● 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


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..


Other Applications For Silica Fume 

● Rubber industry

● Anti-caking industry

● Pellet binder

● Waterglass industry

85% Densified Silica Fume(图1)

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Company: Luoyang Minghong import and export trade Co., Ltd Address:Room 2-502, building 2, No. 9 Shangyi Road, Xigong district, Luoyang, Henan, China. Email:Erin@lyminghong.com Phone: 008618637957769 URL:http://www.supersilicafume.com