Overview of Fumed Silica

Fumed silica, also known as pyrogenic silica, is an ultra-fine, high-purity amorphous silicon dioxide (SiO2) produced via the combustion of silicon tetrachloride in an oxygen-hydrogen flame. It appears as a fluffy white powder and is valued for its ability to thicken, stabilize, and reinforce materials.

Features of Fumed Silica

• High Surface Area: Typically ranges from 50 to 380 m²/g, providing excellent thickening and reinforcing properties.
• Hydrophilic or Hydrophobic Variants: Available in both forms depending on surface treatment, allowing for tailored applications.
• Excellent Thixotropy: Increases viscosity and improves flow properties of liquids and pastes.
• Chemical Inertness: Resistant to most chemicals, making it suitable for a wide range of industrial uses.

•  Enhances free-flowing properties and stability.

(raw material cement undensified grey micro silica fume 90 (sio2 > 95% ) powder d92 93 c 1240)

Specification of raw material cement undensified grey micro silica fume 90 (sio2 > 95% ) powder d92 93 c 1240

This is undensified grey micro silica fume powder. It meets the specification 90. The key material is cement. The silica fume is very fine. It is a by-product. It comes from silicon metal production. The powder looks grey. It has not been densified. That means it is very light and fluffy. The powder is mostly silicon dioxide. We call it SiO2. The SiO2 content is high. It is over 95%. This purity is important. It gives the powder good properties. This powder meets specific standards. The standards are D92 and 93 C 1240. These confirm its quality and performance. The powder particles are extremely small. They are much smaller than cement particles. This fineness is a big advantage. It helps the powder react well. It reacts strongly with cement. The powder fills spaces very well. It fills tiny gaps in concrete mixtures. This makes the concrete much denser. Denser concrete is stronger. It lasts longer too. The powder improves concrete workability. Workability means how easy it is to place and finish. The powder also reduces permeability. Permeability is how easily water or chemicals pass through. Lower permeability protects the concrete. It protects against damage from chemicals or freezing. This powder is widely used. Builders use it in high-performance concrete. They use it in shotcrete. Shotcrete is sprayed concrete. They use it for repairing structures. The powder is good for marine structures. Marine structures face seawater. The powder helps resist sulfate attacks. Sulfates damage concrete. The powder improves abrasion resistance. Abrasion resistance means resistance to wear. Floors and pavements need this. The powder also enhances fire resistance. This powder is a powerful material. It significantly upgrades concrete properties. It is essential for demanding projects.

(raw material cement undensified grey micro silica fume 90 (sio2 > 95% ) powder d92 93 c 1240)

Applications of raw material cement undensified grey micro silica fume 90 (sio2 > 95% ) powder d92 93 c 1240

This is undensified grey micro silica fume powder. It has over 95% silica dioxide (SiO2). It meets the d92 93 c 1240 standard. Builders add this powder to cement and concrete. It makes concrete much better. The tiny particles fill spaces between cement grains. This fills gaps. It also makes the concrete mix denser. This makes the concrete stronger. The concrete also lasts longer.

One main use is high-strength concrete. Builders need this for tall buildings and bridges. The silica fume helps make the concrete hold more weight. It also helps the concrete resist chemicals better. Factories and chemical plants use this concrete. Floors in these places get tough treatment. Silica fume concrete handles this wear well.

Builders also use it near salt water. Sea water can damage regular concrete. Silica fume helps protect the concrete. It makes the concrete less porous. Salt water finds it harder to get inside. This protects bridges, docks, and sea walls.

Sprayed concrete, called shotcrete, uses silica fume too. Workers spray this concrete onto surfaces. It might be for tunnels or mine walls. Adding silica fume makes the sprayed layer stick better. It makes the layer stronger right away. This is good for stabilizing ground quickly.

Repairing old concrete needs good materials. Silica fume is used in repair mortars and grouts. It helps the new material bond tightly to the old concrete. The repair then becomes strong and durable.

Company Introduction

Welcome to HiphopGalaxy, a trusted global supplier of high-quality silicon dioxide (SiO2) powder, renowned for its exceptional purity and performance. Established with a vision to deliver cutting-edge materials that meet the diverse needs of modern industries, we have positioned ourselves as a leading player in the international market.

Our SiO2 powders find applications across multiple sectors, including adhesives, coatings, pharmaceuticals, cosmetics, polymers, and electronics. Each application benefits from the unique properties of our products—high surface area, excellent thixotropy, chemical inertness, and superior reinforcement capabilities. Whether you need hydrophilic or hydrophobic variants, we offer tailored solutions to meet your specific requirements.

If you have any questions, please feel free to contact us(nanotrun@yahoo.com).

Payment Methods

T/T, Western Union, Paypal, Credit Card etc.

Shipment Methods

By air, by sea, by express, as customers request.

5 FAQs of raw material cement undensified grey micro silica fume 90 (sio2 > 95% ) powder d92 93 c 1240

Here are 5 common questions about our undensified grey microsilica fume powder. It has over 95% SiO2 content. It meets the D92 standard. Its specific surface area is about 1240 m²/kg. Its loose density is roughly 93 kg/m³.

What is microsilica fume?
Microsilica fume is an ultra-fine powder. It is a by-product. It comes from producing silicon metal or ferrosilicon alloys. It’s also called silica fume. The particles are incredibly small. They are much finer than cement particles. This powder is grey. It is not densified. That means it hasn’t been processed to make it denser. It stays fluffy and light.

Why add microsilica to concrete?
Adding microsilica fume improves concrete significantly. It makes the concrete much stronger. It fills the tiny spaces between cement particles. This creates a tighter, denser concrete structure. Water finds it harder to penetrate. This improves durability. The concrete lasts longer. It also resists chemicals better. The concrete surface becomes harder and less porous.

How does microsilica work in concrete?
Microsilica fume reacts chemically. It reacts with the calcium hydroxide produced during cement hydration. This is called a pozzolanic reaction. The reaction creates more calcium silicate hydrate. This is the glue that holds concrete together. The result is a stronger matrix. The concrete gains strength faster initially. It also gains higher ultimate strength.

Is microsilica fume safe to handle?
Handle microsilica fume with care. The dust is very fine. Breathing it in is harmful. Always wear a proper respirator. Use approved dust masks. Wear safety glasses to protect your eyes. Wear gloves to protect your skin. Work in well-ventilated areas. Follow all safety rules for handling fine powders.

How should microsilica fume be stored?
Store microsilica fume correctly. Keep it in its original sealed bags. Store it in a dry place. Moisture ruins the powder. It makes the powder clump together. This undensified powder is light and fluffy. Protect it from getting wet. Keep it away from water and high humidity. Use it before the expiry date.

(raw material cement undensified grey micro silica fume 90 (sio2 > 95% ) powder d92 93 c 1240)