94% Undensified Silica Fume: A High-Performance Supplementary Cementitious Material
94% Undensified Silica Fume (USF) is a highly effective supplementary cementitious material derived from the byproduct of silicon and ferrosilicon alloy production. It contains approximately 94% amorphous silica (SiO2) and possesses exceptional physical and chemical properties that make it a valuable addition to various construction materials, especially concrete and cement-based products. With a low bulk density ranging from 250 to 350 kg/m3, 94% Undensified Silica Fume is lightweight and easy to handle, resulting in reduced transportation costs. Its specific surface area, typically between 15,000 and 30,000 m2/kg, allows for a high pozzolanic reactivity that enhances the mechanical and durability properties of the final products. The key features of 94% USF include its ability to significantly increase compressive and flexural strength, reduce permeability, and enhance resistance to chemical attack and abrasion. The use of this material contributes to improved long-term performance ...