Why is Silica Fume used in concrete?

Why is Silica Fume used in concrete?

Silica fume, also known as microsilica, is a byproduct of producing silicon metal or ferrosilicon alloys. It is a highly reactive pozzolan that is used in concrete to improve its properties and performance. Here is why silica fume is used in concrete:

Increase in strength

Silica fume is composed of fine particles that fill the voids between cement particles, leading to a denser concrete mix. This densification results in higher compressive strength and reduced permeability of the concrete.

Improved durability

The dense matrix created by silica fume helps in reducing the ingress of harmful substances such as chlorides and sulfates, which can cause deterioration of the concrete over time. This leads to improved durability and longevity of the concrete structure.

Reduced cracking

Silica fume helps in mitigating the formation of microcracks in concrete by enhancing the bond between the cement paste and aggregates. This results in reduced shrinkage cracking and increased resistance to temperature fluctuations.

Enhanced workability

Despite its fine particle size, silica fume improves the workability of concrete by acting as a lubricant between particles. It also helps in reducing bleeding and segregation, making the concrete easier to handle and place.

Environmental benefits

By using silica fume in concrete, the amount of cement required can be reduced, leading to lower carbon dioxide emissions during production. Additionally, the utilization of a byproduct like silica fume helps in reducing waste and conserving natural resources.

In conclusion, silica fume is a valuable additive in concrete due to its ability to enhance strength, durability, and workability while also offering environmental benefits. Its use in concrete mixtures has become increasingly popular in the construction industry for achieving high-performance and sustainable structures.

The company is the world’s best Silica Fume Concrete, Low Price Microsilica Fume Supplier in China, Undensified Silica Fume supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.