10 Questions You Should to Know about 85% Densified Silica Fume

Product Overview

For additional information, please browse our site Ewende.

 

Silica fume, often referred to as microsilica, is an amorphous (non-crystalline) form of silicon dioxide. This ultra-fine powder is a by-product generated during the production of silicon and ferrosilicon alloys. With spherical particles that are less than 1 μm in diameter, usually around 0.15 μm on average, silica fume exhibits a super high activity index, making it roughly 100 times smaller than standard cement particles. The bulk density varies considerably based on the degree of densification, ranging from 100 kgs/m³ (undensified) up to 720 kgs/m³.

The primary uses for silica fume include applications in concrete, grouts, mortars, refractories, ceramics, oil well grouting, shotcrete, and repair products.

Utilization of Silica Fume in Repair Products

Silica fume is integral to various cement-based repair solutions. Mortars or grouts enhanced with silica fume can be specifically modified to meet the demands of various applications. Overhead and vertical mortars benefit significantly from the increased surface adhesion provided by silica fume. This ingredient not only boosts cohesiveness to optimize underwater grouting effectiveness but also reduces permeability in grouts utilized in post-tensioning scenarios, thereby enhancing resistance to aggressive chemical exposure.

1. Lightweight
2. Low permeability
3. Non-bleeding and non-segregating

As the leading supplier of 85% Densified Silica Fume, we serve as your comprehensive resource for all relevant needs. Our knowledgeable staff is prepared to help you identify the right products.

For further reading:
What Is The Difference Between Hydroxypropyl ...

1. Enhanced resistance to chloride, acid, nitrate, and sulfate attacks

Company Overview

SY (SanYuan) Company has been involved in the research and promotion of microsilica since its establishment and has subsequently built several production facilities. Apart from the original factory in Yinchuan, a new "Lanzhou factory" has been inaugurated, alongside upgrades to the Yinchuan plant, which has made it safer, more technologically advanced, efficient, and environmentally friendly. The company now operates a Tianjin Distribution Center, supplementing its facilities in Gansu, Ningxia, and Inner Mongolia to enhance quality inspection and prompt delivery.

With almost two decades of experience in producing and selling microsilica, we boast an annual production capacity exceeding 100,000 tons. Sanyuan is recognized as a pioneer in the microsilica industry in China and has played an active role in shaping the national standards for microsilica.

Packaging & Shipping

We offer various packaging options, including: 25 kg paper bags, 25 kg plastic woven bags, and jumbo bags of 500 kg or 600 kg. Packaging can be customized according to your preferences, including pre-shipping photos.

Once payment is received, our dedicated forwarder can ensure that your goods arrive promptly and without customs issues within 7 working days.

FAQ

1. What type of payment do you accept?
T/T in advance
2. What are your delivery terms?
FOB, CIF
3. How long does production take?
Usually 10 days after contract confirmation
4. Do you provide samples for testing?
Yes, we would be glad to send you free samples if you cover the freight costs.

Properties of Silica Fume

Silica fume, commonly known as microsilica, is an amorphous, super fine active silica material with notable pozzolanic properties formed through the rapid oxidation and condensation of SiO₂ and Si gas with air during high-temperature smelting processes.

Key Characteristics:

1. Silica fume appears as white, gray, or black powder with a refractoriness greater than 1,600°C. Its bulk density ranges between 200-250 kg/m³ but can be densified to 300-750 kg/m³, depending on production conditions.

2. The fineness of silica fume is critical, with over 80% of particles measuring less than 1 μm and a specific surface area of 20 to 28 m²/g, making it over 80-100 times finer than conventional cement and 50-70 times finer than fly ash.

3. The morphology and mineral structure developed during the formation of silica fume result in a smooth surface with both single and aggregated particles. This distinctive particle structure endows silica fume with very high surface areas and reactivity, enhancing its usefulness as a superlative pozzolanic material.

For further information, check out: Silica Fume Properties.

Applications:

Silica fume is widely applicable in various fields, including:

• Reactive powder concrete (RPC)
• High-strength, wear-resistant flooring
• Oil field cementing and anchoring agents
• High-grade ditch cover plates and track slab admixtures
• Commercial and self-leveling concrete
• Non-shrinkage grouts and polymer mortars

You are encouraged to combine silica fume with water-reducing agents. In practical applications, the typical percentage of silica fume varies but is often stated as follows:

(1) High-performance concrete: 5-10%
(2) Hydraulic concrete: 5-10%
(3) Shotcrete: 5-10%
(4) Pump agent: 2-3%
(5) Industrial wear-resistant flooring: 5-10%
(6) Polymer and thermal insulation mortars: 10-15%
(7) Amorphous refractory castables: 6-8%

Before utilizing silica fume, it is essential to determine the appropriate dosage based on your specific needs.

Henan Superior Abrasives I/E Co., Ltd ranks among the largest Suppliers of Silica Fume in China, offering a range of products including 85D, 92D, 94D, and 96D microsilica for international markets. For more details, please explore our online shop.

If you have questions or inquiries, please do not hesitate to reach out directly, or leave a comment in the form below and we will respond promptly. Thank you!

For additional information on 94% Densified Silica Fume, please feel free to contact us.