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94% Undensified Silica Fume

Place of Origin: China Color: Grey
Existing Form: Powder SiO2: ≥93.0%
Bulk Density: 280-350kg/m3 Specific Surface: 15-30m2/g
Package: 25kg/ plastic bag OR 500kg/ jumbo bag Application: Insulation materials, mortar, pipe pile, rubber reinforcement
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Microsilica ( Silica Fume) is a co-product from the production of silicon or ferrosilicon metal. Silica fume is a mineral admixture, a very fine powder of spherical particles that average 0.1 to 0.3 microns in diameter with a surface area of 17 to 30 m2/g. 

94% Undensified Microsilica (Silica Fume Grade 94) with Minimum SiO2 Content 94%, grey or gray – white powder, and the refractoriness is >1600℃.

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Tags: 94% Undensified Microsilica, 94% Undensified Silica Fume, Silica Fume Grade 94, Microsilica 940U, Silica Fume 940U, Silica Fume For Sale, Silica Fume Concrete PPT, Silica Fume Concrete Mix Design, Silica Fume Admixture, Silica Fume Concrete PPT.

(1). Silica Fume For The Oil Industry

● Silica fume can be used for a primary placement of grout as a hydraulic seal in the well bore, or secondary applications such as remedial operations including leak repairs, splits, closing of depleted zones.

Oil Well Grouting

Whether used for primary (placement of grout as a hydraulic seal in the wellbore) or secondary applications (remedial operations including leak repairs, splits, closing of depleted zones), the addition of silica fume enables a well to achieve full production potential. Besides producing a blocking effect in the oil well grout that prevents gas migration, it provides these advantages:

●  Improved flow, for easier, more effective application

●  Dramatically decrease permeability, for better control of gas leakage

●  Increased durability and compressive strength

●  Lightweight

Cementing is an important operation in the drilling process, and oil well cementing is an important material for sealing casing and the annular space of the wellbore. Because the well is deep and shallow, underground has atmospheric pressure and normal temperature, high pressure and high temperature, and there are various chemical substances in the stratum, so the oil well cementing is widely adaptable.

The Optimization Of Cementing Parameters Is Mainly Concerned With The Following Aspects:

● Good stability, uniform material mixing, good fluidity, small initial consistency, good pump ability and low difficulty of field construction.

● High slurry rate and good performance price ratio, can reduce the cementing cost and achieve the purpose of saving energy and reducing consumption.

● High compressive strength and less free liquid, it can effectively reduce water loss and water separation of cement slurry, and can meet the requirements of cementing quality.

● The low specific gravity of cement slurry after mixed, slurry will not cause the situation of leakage formation, and can meet the cementing of various complicated strata.


The use of silica fume low density formula cement is good mixing finished products, and there are less material in the well. It is convenient and concise in use. It improves the artificial mixing material and loading and unloading in the oilfield, reduces the working time and reduces the difficulty of the cementing operation.

● The characteristics of high pulping rate of silica fume low density formula cement can reduce the usage of well entry materials and reduce the cementing cost. It is estimated that using silica fume low density formula cement can reduce 33% raw materials, high cost performance, and achieve the purpose of energy saving and consumption reduction.

● Due to the low density of silica fume low density formula cement, there will be well segments with poor cementing quality in permeable water layer and high-pressure gas well cementing section, but it can reduce the condition of long cementing and sealing section and pressure leakage. In response to this situation, there is still room for improvement in the use of silicon fume powder low density formula cement.

(2). Silica Fume For The Natural Gas Industry

●  Silica fume enables a well to achieve full production potential. The silica fume works as a blocking effect in the oil well grout, which prevents gas migration and other advantages to enhance well productivity.

94% Undensified Silica Fume
Analysis/ PropertiesValue
SiO2Silicon Dioxide, AmorphousMin94%
Fe2O3Iron OxideTypical0.19%
Al2O3Aluminium OxideTypical0.27%
CaOCalcium OxideTypical0.26%
MgOMagnesium OxideTypical0.49%
K2OPotassium OxideTypical0.50%
Na2OSodium OxideTypical0.38%
P2O5Phosphorus PentoxideTypical0.26%
MnOManganese OxideTypical0.25%
TiO2Titanium OxideTypical0.21%
Loss On IgnitionTypical2.88%
Coarse Particles >45µm (325Mesh)Max1.20%
Bulk Density(As Packed)200-350kg/mU

(1). Silica fume in Concrete

 Increacing strength

 Increasing density

 Frost resistance

 Early strength

 Abrasion resistance performance, anti-cavitations


(2). Silica fume in 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). Silica fume is used in 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 for Silica Fume

 Rubber industry

 Anti-caking industry

● Pellet binder

 Waterglass industry


 Self-Compacting Concrete

Mining & Tunnelling.

High rise buildings.

For producing all concrete products including readymix concrete.

Motorways, bridges & dams etc

94% Undensified Silica Fume(图1)

94% Undensified Silica Fume(图2)

94% Undensified Silica Fume(图3)

94% Undensified Silica Fume(图4)

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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