Silica Tilling Fume

Product Details

Silica fume consists of spherical particles with a diameter of about 0.1 µm, which is about 100 times smaller than average cement particles. Its high silica content (usually >85%) and ultra-fine size allow it to fill voids in concrete, improving density, reducing permeability, and increasing compressive and tensile strength. Key Properties Chemical Composition: >85% SiO₂ Particle Size: 0.1 µm (ultra-fine) Color: Gray or off-white powder Specific Surface Area: Very high (≈15,000–30,000 m²/kg) Pozzolanic Activity: Reacts with calcium hydroxide to form additional calcium silicate hydrate (C-S-H) Applications High-performance and ultra-high-performance concrete Reducing permeability and improving durability Marine and bridge structures exposed to aggressive environments Shotcrete and grouting applications Benefits Increases compressive and tensile strength of concrete Improves chemical resistance and reduces chloride penetration Enhances bonding in cementitious mixtures Reduces bleeding and segregation in concrete If you want, I can also provide a short 2–3 line lab description suitable for material testing reports or catalogs.