Fume Silica with Low Permeability

Ref Price:
Loading Port:
China Main Port
Payment Terms:
TT or LC
Min Order Qty:
10 Metric Tons m.t.
Supply Capability:
3600 Metric Tons per Month m.t./month

OKorder Service Pledge

Quality Product

Order On-line Tracking

Timely Delivery

OKorder Service Pledge

Credit Rating

Credit Services

Credit Purchasing

Share to:

Product Description:

1.Microsilica 85%-98%

2.High fluidity

3.Low permeability

4.Meets the requirements of ASTM C-1240 



*Microsilica , also called silica fume or micro silica, is a byproduct of producing silicon metal or ferrosilicon alloys. 

*Silicon metal and alloys are produced in electric furnaces. The raw materials are quartz, coal, and woodchips. 

*The smoke that results from furnace operation is collected and sold as silica fume, rather than being land filled. 

*Silica fume consists primarily of amorphous (non-crystalline) silicon dioxide (SiO2), its average granule diameter is 0.15~0.20 µm,specific surface area is 15000~20000 m2/kg, and it has extremely strong surface active.

*Microsilica can be used in a variety of cementation products, such as concrete, grouts, and mortars as well as elastomeric, polymer, refractory, ceramic and rubber applications.

*HS No.: 28112200 China Origin, microsilica meets the requirements of ASTM C-1240.

*Microsilica CAS #: 69012-64-2


Main function

*Very low permeability to chloride and water intrusion.

*Extremely high electrical resistivity (20 to 100 times greater than ordinary concrete).

*Increased abrasion resistance on decks, floors, highways and marine structures.

*Superior resistance to chemical attack from chlorides, acids, nitrates and sulfates.


Specification of Microsilica

Index items

Standard Value

SiO2(Silicon Dioxide)

Min. 97.0%


Max. 0.7%

Fe2O3 (Iron Oxide)

Max. 0.1%

Al2O3(Aluminium Oxide)

Max. 0.3%

CaO(Calcium Dioxide)

Max. 0.3%

MgO(Magnesium Dioxide)

Max. 0.2%

K2O(Potassium Dioxide)

Max. 0.3%

Na2O(Sodium Dioxide)

Max. 0.2%

P2O5(Phosphorus Pentoxide)

Max. 0.1%

SO3(Sulphur Trioxide)

Max. 0.2%

Cl (Chloride)

Max. 0.1%

Moisture Content(H2O )

Max. 0.5%

Loss on Ignition(L.O.I)

Max. 0.5%

Percent Retained On 45μm (325 sieve)

Max. 0.5%

Bulk Density

250-300kg/m3 and 450-600kg/ m3


Micro-Silica Fume company 


We are willing to take a sincere attitude and cooperation with you.


(1) Quality 

We have our own test lab in factory and supply stable and reliable microsilica to our customers.


(2) Price


(3) Convenient

Delivery is fast and easy.


(4) Service

Our sales groups are positive attitude, and 24 hours feedback service to ensure the service is good.


Send a message to us:

Remaining: 4000 characters

- Self introduction

- Required specifications

- Inquire about price/MOQ

Q:what is the difference between concrete and cement and stuco?
Same thing, different texture and application of it on cinder-block and stucco. Some cement is rough, though, to be used for a walk so it is not slippery.
Q:how often do you have to paint fiber cement siding?
Fiber cement (best brand is James Hardie) board has a 50 year warranty, needs paint every 7 years or so, depending on paint quality, facing (North and East less often than South and West) and climate. Much better long term than vinyl -- over time the oils will cook out of the vinyl, leaving it chalky looking and very brittle.
Q:how to set up a cement slab?
with wood stakes and nails a level or laser string line sledge hammer. Need more info to help
Q:How do i remove cement board from the top of ceramic tile?
Q:Where can I find a cement goose?
We have those places with cement lawn ornaments everywhere here in Indiana. I dont know what part of Ohio you are in, but here are a bunch of places in Ohiop that sell concrete lawn ornaments. They should have the geese. Im sure it is a popular item. Dont forget to buy clothes for your goose!
Q:What is a chemical that softens rock and cement?
Hydrochloric acid softens cement. You can buy large containers of it for removing cement from brickwork. It will also attack some types of rock, especially limestones. Be careful with it though!
Q:How to start a cement factory?
Are you talking about a plant that supplies bags of cement mix like you'd buy at Home Depot, or a plant where you fill the cement mixer trucks and they go out and pour the stuff into whatever? Either way, the easiest way might be to find a defunct one and reopen it.
Q:Does anyone know a liquid that will soften cement?
No such luck. The only way to remove it is to dig it up, smash it, cut it off. It's component uses water to create it. It is used to make foundations so it is made to withstand anything on the planet.
Q:is there anything wrong with building a pond out of cement?
Cement-by which I presume you mean concrete, is fine for building a pond. It Will have an effect on the ph of the water. Cement is alkaline so the lime content would be very harmful to fish and aquatic life in the short term. Eventually it would become neutral but you would need to waterproof it with something anyrate which would keep the water away from contact with the cement. You can use bitumen which you paint on or a sheet of strong plastic is often enough.. Dig out the shape you want first and then shovel the concrete into it but if the sides are steep then you will have to make the concrete very dry to prevent the concrete running back into the bottom. You can always then give a thin coat of wetter cement to the sides later if you prefer
Q:how do you resurface cement steps?
First check the quality of the cement, it may be inferior to construction standards. When you determine it is good, then you need to rough up the surface with a tool like a chisel to give the new surface a grip. Mix a screened sand with some portland at a 2 to 1 mix and trowel it on with a steel finishing trowel
Relying on many years of a good reputation and good service, we have many customers from at home and abroad. We have established long-term and steady business relationship with them. Our Microsilica products are not only selling well in China, but also exported to the United States, Germany, Australia, Asia, and other countries and regions around the world.

1. Manufacturer Overview

Location Luoyang, Henan, China (Mainland)
Year Established 2011
Annual Output Value US$2.5 Million - US$5 Million
Main Markets North America; South America; Eastern Europe; Southeast Asia; Oceania; Mid East; Eastern Asia
Company Certifications ISO 9001:2008

2. Manufacturer Certificates

a) Certification Name  
Validity Period  

3. Manufacturer Capability

a)Trade Capacity  
Nearest Port
Export Percentage 31% - 40%
No.of Employees in Trade Department
Language Spoken:
b)Factory Information  
Factory Size:
No. of Production Lines
Contract Manufacturing
Product Price Range