Effects, and Precautions for Use of Silica Fume

Table of Contents

About silica fume

Silica fume is amorphous, powdered byproduct obtained from the smelting process of ferrosilicon, industrial silicon by a baghouse.

The average particle size of silica fume is 0.1-0.15 μm, which is a few percent of the average particle size of cement. And it has an extremely strong surface activity with a specific surface area of 15-27 m2/g. The unique properties of silica fume make it widely used in applications such as marine, harbor terminals, subways, tunnels, bridges, high-rise buildings, chemical industry. It mainly improves the flowability and denseness of the product and significantly increases the high-temperature strength and thermal shock properties.

A large amount of silica fume is used in cement or as a concrete admixture to improve their performance, formulate concrete with ultra-high strength, wear resistance, scour resistance, corrosion resistance, and anti-penetration, anti-freeze, early strength characteristics, for dams, large reservoirs, hydropower, seaport terminals, railroad bridges, highways, runways of airports, tunnels and skyscrapers and other projects.

Silica fume can also be used in the production of refractory materials and ceramic products to improve the strength and durability of products, and used in paints, coatings, resins, rubber and other polymer materials fillers, it can play a role in improving the overall performance of materials.

Effects and advantages of silica fume

For concrete

For refractory materials

Silica fume applied to refractory materials has the following characteristics.

Silica fume – uses and precautions

For refractory

According to the different properties of refractory raw materials, orthogonal design is carried out and the best formulation is selected through comparative tests. Refractory materials usually use undensified silica fume.

For high performance concrete

Adding and mixing

Pouring and curing

Silica Fume Products