As the demand for sustainable construction materials rises, the utilization of microsilica in the concrete industry is increasing rapidly. Also known as silica fume, microsilica is a by-product of silicon and Ferrosilicon alloys production, and it typically has a particle size between 0.1 to 1.0 microns. The ultrafine particles of microsilica can fill in the spaces between cement particles to increase the strength, durability, and longevity of concrete structures. In this blog, we will discuss the OEM microsilica production process and its various applications in the construction industry.
OEM microsilica production process.
The production of microsilica is mainly a two-step process. Initially, silicon or Ferrosilicon alloys are produced in an electric arc furnace. During this process, silica and carbon react at high temperatures to produce silicon and carbon monoxide. The silica is vaporized and then condensed to produce a fine powder, which is called microsilica. OEM microsilica is the product that has undergone the processing designed for specific applications, such as bridge decks, railways, tunnels, and precast concrete.
Applications of OEM microsilica.
1. High-performance concrete.
Microsilica is a key ingredient in high-performance concrete, which is used in the construction of skyscrapers, bridges, dams, nuclear power plants, and offshore structures. The inclusion of microsilica in concrete improves its compressive strength, flexural strength, bond strength, and durability. High-performance concrete with microsilica can withstand harsh environmental conditions, including freeze-thaw cycles, alkaline or acid attack, and corrosion from salts and chlorides.
2. Shotcrete.
Shotcrete is a method of spraying concrete onto a vertical or overhead surface using a high-speed air stream. Shotcrete is commonly used to reinforce tunnel linings, dam walls, and other structures that require erosion protection. OEM microsilica can be incorporated into the shotcrete mix to improve its workability, cohesion, and bonding to the substrate. The use of microsilica in shotcrete can also reduce rebound and waste and improve its overall quality.
3. Precast concrete.
Precast concrete is a process of casting concrete products in a controlled environment and then transporting them to the construction site. Precast concrete is used for a wide range of applications, including building facades, parking garages, bridges, and culverts. The addition of microsilica to precast concrete improves its strength, density, and water permeability. Precast concrete with microsilica can also minimize the cracking and shrinkage that may occur during the curing process.
4. Cement-based grouts.
Cement-based grouts are used for structural repairs, void filling, and soil stabilization. The use of microsilica in cement-based grouts improves their flowability, setting time, and strength. Grouts with microsilica can also minimize the segregation and bleeding that occurs during the placement process.
5. Refractory materials.
Refractory materials are used in high-temperature applications, such as furnaces, kilns, and boilers. The inclusion of microsilica in refractory materials improves their resistance to thermal shock, corrosion, and erosion. Refractory materials with microsilica can also improve their densification, permeability, and adhesion to the substrate.
In conclusion, OEM microsilica is a versatile additive that can improve the properties of various construction materials, including concrete, shotcrete, precast concrete, cement-based grouts, and refractory materials. By adding microsilica, designers and engineers can increase the strength, durability, and longevity of structures and reduce the environmental impact of construction activities. OEM microsilica is a critical component for sustainable construction materials.
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