Silica Fume

Description

1. Product Overview

Silica Fume is an ultra-fine amorphous silicon dioxide (SiO₂) powder collected as a by-product during silicon and ferrosilicon alloy production. It is primarily used as a high-performance pozzolanic additive in concrete, refractory, and specialty cement applications. With its extremely fine particle size and high silica content, Silica Fume significantly enhances strength, durability, and chemical resistance in cementitious systems. In modern infrastructure and high-specification construction markets, Silica Fume is strategically critical for delivering superior structural performance, extended service life, and reduced lifecycle costs.

2. Key Specifications & Technical Characteristics

• Chemical Composition:
  • Silicon Dioxide (SiO₂): Typically ≥85%–96%
  • Loss on Ignition (LOI): Typically ≤6%
  • Trace elements: Fe₂O₃, Al₂O₃, CaO, MgO (as per specification)
• Purity / Grade:
  • Undensified or densified industrial grade
  • Conforms to relevant international standards (ASTM, EN, or equivalent upon request)
• Physical Characteristics:
  • Form: Ultra-fine powder (amorphous)
  • Color: Light grey to dark grey
  • Particle size: Approximately 0.1–0.3 microns (average)
  • Specific surface area: Typically 15–30 m²/g
  • Bulk density:
    • Undensified: ~200–350 kg/m³
    • Densified: ~500–700 kg/m³
  • Moisture content: Controlled and minimal
• Packaging Options:
  • 1 MT jumbo bags (FIBC)
  • 20–25 kg bags
  • Bulk tanker loading (for densified grade)
• Shelf Life:
  • Stable under dry storage conditions
  • Recommended storage: Moisture-proof, sealed packaging in covered environment

3. Core Industrial Applications

Primary Industries:

• Ready-mix and precast concrete manufacturing
• Infrastructure and mega construction projects
• Oil & gas well cementing
• Refractory production
• Marine and offshore construction

Operational Use Cases:

• High-strength and ultra-high-performance concrete (UHPC) production
• Sulfate-resistant and chloride-resistant concrete structures
• Bridge decks, marine structures, tunnels, and dams
• Shotcrete and repair mortars
• High-temperature refractory castables

Performance & Commercial Advantages:

• Significantly increases compressive and flexural strength of concrete
• Reduces permeability, enhancing durability and corrosion resistance
• Improves workability and cohesion in concrete mixes
• Extends service life of infrastructure, reducing maintenance costs
• Enables lower cement consumption in optimized mix designs

4. Competitive Advantages

• Quality Consistency: Controlled production sourcing with certified chemical and physical test reports.
• Supply Reliability: Stable bulk availability supporting large-scale infrastructure and industrial projects.
• Logistics Capability: Flexible packaging options and international bulk shipment coordination.
• Price Competitiveness: Cost-effective performance enhancer delivering high strength per unit cost.
• Sustainability: Industrial by-product utilization reducing CO₂ footprint in concrete production.
• Technical Support: Detailed technical data sheets (TDS), MSDS documentation, and mix design consultation available upon request.

Silica Fume is positioned as a strategic procurement solution for construction and industrial buyers seeking superior performance, long-term durability, and sustainable material optimization.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): BULK 20 MT
• Loading Capacity:
  • 20’ Container: Approx. 20–22 MT
  • 40’ Container: Approx. 26–28 MT (subject to packaging configuration)