94% Densified Silica Fume


94% Densified Silica Fume



  • 94% Densified Silica Fume is a micro silica fume with 94% SIO₂ content, and the Bulk density is 240-320kg/m³.
  • 94% Densified Silica Fume ( Microsilica 94D) is a type of silica fume that has been processed to increase its bulk density. This makes it easier to handle and transport, and can also improve its performance in concrete.
  • 94% Densified Silica Fume, is a byproduct of the production of silicon and ferrosilicon alloys. It is a highly reactive pozzolan with a high silica content of over 94% and a bulk density of around 550-700 kg/m3. The specific surface area of 94% Densified Silica Fume is very high, ranging from 15,000 to 30,000 m2/kg, making it an ideal supplementary cementitious material for enhancing the strength, durability, and workability of concrete.
  • Technical indicators:


     Standard Value

    Silicon Dioxide(SiO2)


    Loss on Ignition(L.O.I)


    Moisture Content(H2O)


    Percent Retained On 45μm(325 sieve)


    Bulk Density


94% Densified Silica Fume Features

  • Low 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.

94% Densified Silica Fume Parameters

National Standards for Silica Fume for Concrete
National Standards and OrganizationsEuropeNorwayFranceAustraliaUnited StatesCanadaJapanChina
Standard Number132633045P18-50235861240A23.5A62071873627690
SiO2 %   ≥858585858585858585
SO3  %   <2 2.53 13  
CI- %   <0.3Report0.2Report
CaO  %   <12    1  
MgO  %   <      5  
Si %  <0.4     0.4  
Na2O+K2O     %  <  4     1.5
C    %   <  4      
Water Content   %   <   23 333
Burn Vector   %   <45 666564
Specific Surface Area ㎡/g15-35≥1220-35   ≥15≥15≥15
45μm Sieve Residue  %   <    1010 5 
Loose capacity   kg/m³   ReportReport    
Specific Gravity g/㎝³  2.1-2.3   Report  
Water Demand Ratio     %   ≤       125125
Volcanic Ash Activity Index%(3d)  ≥         
%(7d)  ≥   Report105858595105
%(28d) ≥10095    100115 
Water to Glue Ratio0.50.5  0.484
ConservationStandardStandard  AcceleratedAcceleratedStandardStandardAccelerated

94% Densified Silica Fume Application

Ewende is one of the leading silica fume manufacturers in China, we provide 85%-99% densified silica fume and undensified silica fume powder to our customers, good silica fume could help you make perfect products and improve your business ROI, contact us for a good microsilica price silica fume price & advice.

94% Densified Silica Fume Packaging

Ewende New Material is a leading provider of Silica Fume and Abrasives in China, and also the premium source of high-performance Products for concrete and abrasives industries. We can also produce according to your requirement.

Quality Control

Ewende Silica Fume has a full set Occupational Health & Safety Management System Certificate. As well as CNAS, IAF certification.

♦ The chemical composition and physical properties are regularly tested in accordance with international standards.

Silica Fume for Sale

Get A Free Consultation With Us

Ewende’s mission is to provide professional services, high quality products, strict after-sales control, and actively solve customer problems for mutual benefit and win-win.

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silica fume powder


♦ How long will it take for delivery?
 Usually, it will be around 15 days after the order confirmation or deposit.

♦ What are the payment terms?
 TT, L/C, D/P, and Paypal are also available.

♦ Can you print our brand or logo for the packing?
We will offer our Neutral Packing, according to the actual quantitative can negotiate the outer packaging logo spraying.

♦ What’s your MOQ?
 Usually 10 tons to start.

♦ Can you offer samples for testing?
Sure, samples would be available for testing purposes. Usually, our samples are for free in testing quantity, if more, our customer service department would consider them accordingly.

♦ How to get a quote?

Hello, please provide the detailed product model, specification and quantity. If there is a bill of materials, you can send the bill of materials to ewende@microsilica-si.com.

♦ Are you a factory or a middleman?

Sichuan Ewende New Materials Co., Ltd. is a professional manufacturer of micro-silica fume, with a variety of submerged arc furnace types.