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Microsilica, also known as silica fume or condensed silica fume, is an industrial by-product commonly used as an additive in concrete and other construction materials. It consists of very fine silica particles, typically with particle sizes in the nanometer range. Microsilica is usually produced as a by-product during the manufacture of silica or silicates, such as in the production of ferrosilicon.
Microsilica is widely used in construction due to its beneficial properties, including:
- Strength and Durability Enhancement: Adding microsilica to concrete or other construction materials can increase their strength and durability.
- Shrinkage Control: The use of microsilica in concrete helps control shrinkage and cracking that may occur during curing.
- Chemical Resistance: Microsilica improves the resistance of concrete to chemical corrosion, enhancing its stability in harsh environments.
- Reduced Permeability: Microsilica can decrease the permeability of concrete, making it more resistant to water and moisture.
- Improved Thermal Insulation Properties: Addition of microsilica can also improve the thermal insulation properties of concrete.
Overall, microsilica is considered an effective and useful material in the construction industry, helping to enhance the performance of construction materials and improve their properties in general.
