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.

(Concrete Admixtures Microsilica Silica Fume CAS No. 69012-64-2 Silica Fume for Concrete)

Specification of Concrete Admixtures Microsilica Silica Fume CAS No. 69012-64-2 Silica Fume for Concrete

Microsilica, likewise called silica fume (CAS No. 69012-64-2), is a vital concrete admixture. This product contains ultrafine fragments. It is a by-product from silicon metal manufacturing. Its particles are incredibly small. This little size gives it distinct homes in concrete. Adding microsilica significantly boosts concrete efficiency.

The main benefit is denser concrete. The little silica fume particles fill up the spaces in between cement grains. They also fill up rooms between fine aggregates. This loading action lowers concrete’s interior porosity. Less porosity suggests a much tighter interior framework. This thick framework directly increases concrete strength. Concrete gains greater compressive toughness. It likewise gains greater flexural toughness. The improvement is noticeable.

This densification also makes concrete less permeable. Water discovers it more challenging to penetrate the hardened concrete. Unsafe chemicals like chlorides also battle to go into. This greatly enhances concrete longevity. Frameworks last longer. They withstand rust better. They hold up against freeze-thaw cycles much better. Chemical attack resistance improves also. Microsilica concrete is harder in severe atmospheres.

Another benefit is the pozzolanic reaction. Microsilica responds chemically with calcium hydroxide in the cement paste. This reaction creates additional calcium silicate hydrate. This is the primary binder in concrete. A lot more binder indicates more powerful paste. The response consumes free lime. This more contributes to concrete density and toughness.

Using microsilica does change fresh concrete actions. It typically minimizes workability. The mix can feel stickier. Including it typically calls for more superplasticizer. This preserves the needed slump for positioning. It can dim the concrete’s shade somewhat. The final surface area is often smoother. Microsilica is flexible. It operates in many concrete kinds. These consist of high-strength blends, shotcrete, and repair mortars. Its key role is creating exceptionally durable, high-performance concrete frameworks.

(Concrete Admixtures Microsilica Silica Fume CAS No. 69012-64-2 Silica Fume for Concrete)

Applications of Concrete Admixtures Microsilica Silica Fume CAS No. 69012-64-2 Silica Fume for Concrete

Concrete admixtures using microsilica, also called silica fume (CAS No. 69012-64-2), significantly upgrade concrete performance. This material is a super-fine powder. It comes from producing silicon metal or ferrosilicon alloys. Adding silica fume to concrete mixes delivers major advantages. It makes concrete much stronger. Concrete with silica fume can be twice as strong as regular concrete. This strength boost happens faster. Builders can remove forms sooner. Projects finish quicker.

Silica fume greatly improves concrete’s durability. It fills the tiny spaces between cement particles. This creates a much denser concrete. Denser concrete stops water and chemicals from getting inside. This is vital for structures exposed to harsh conditions. Think bridges near the ocean, parking garages with road salt, or chemical plants. The dense concrete resists corrosion on the steel reinforcement inside. Structures last longer. Repair costs go down.

The powder also reduces concrete permeability. Water cannot pass through easily. This stops leaks in water tanks or underground structures. It protects against freeze-thaw damage in cold climates. Water inside concrete expands when it freezes. This causes cracking. Less water inside means less damage. Silica fume also fights damage from sulfates in soil or water. Sulfates attack concrete. Silica fume makes concrete more resistant.

Another benefit is better cohesion. Sticky concrete is easier to place. It holds together well. This is perfect for tall walls or shotcrete applications. Sprayed concrete needs to stick in place immediately. Silica fume helps achieve that. It reduces segregation. Heavy parts don’t sink to the bottom. The mix stays uniform. Finishing concrete surfaces is easier too. Smoother, harder surfaces result. Silica fume reacts chemically with the cement paste. It forms additional strong material. This fills voids. The concrete matrix becomes tighter and tougher overall.

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 Concrete Admixtures Microsilica Silica Fume CAS No. 69012-64-2 Silica Fume for Concrete

What is microsilica silica fume?
Microsilica silica fume is a very fine powder. It’s a byproduct from making silicon metal or ferrosilicon alloys. Its CAS number is 69012-64-2. It looks like grey dust. It contains mostly very pure silicon dioxide. The particles are extremely small.

Why add silica fume to concrete?
Adding silica fume makes concrete much better. It fills tiny gaps between cement particles. This makes the concrete denser. Denser concrete is stronger. It resists water penetration much better. It also makes concrete more durable against chemicals. This is good for tough places like bridges or marine structures. It makes concrete stronger.

How much silica fume gets added to concrete?
The amount used depends on the project needs. Usually, it’s between 5% and 10% of the cement weight. Sometimes a bit more gets used for special cases. Always follow the supplier’s advice. Too much can make the concrete very sticky. This makes it hard to place properly. Testing helps find the best amount.

Is silica fume safe to handle?
Silica fume itself is not toxic. But breathing the dust is bad. It can irritate your lungs. Always wear proper safety gear. Use a good dust mask. Wear safety glasses. Wear gloves. Handle it in well-ventilated areas. Keep it away from your skin and eyes. Follow all safety instructions on the label.

How is silica fume different from regular silica?
Silica fume is not the same as regular silica sand. Silica fume particles are incredibly tiny. They are much smaller than cement grains. This small size is key to its benefits. It reacts with the concrete differently. Silica sand is coarse aggregate. It doesn’t provide the same filling effect. Silica fume powder acts like a super-fine filler.

(Concrete Admixtures Microsilica Silica Fume CAS No. 69012-64-2 Silica Fume for Concrete)