Fly Ash – Class C

Description

1. Product Overview

Fly Ash – Class C is a high-calcium pozzolanic material produced as a by-product of lignite or sub-bituminous coal combustion in thermal power plants. It is primarily used as a supplementary cementitious material (SCM) in concrete production, enhancing strength development, workability, and long-term durability.

With both cementitious and pozzolanic properties, Class C Fly Ash contributes to improved early strength gain and reduced clinker consumption in blended cement systems. As global construction industries prioritize cost efficiency and carbon reduction, Class C Fly Ash plays a strategically critical role in sustainable infrastructure development and low-carbon concrete manufacturing.

2. Key Specifications & Technical Characteristics

• Primary Chemical Composition:
  • Calcium Oxide (CaO) – typically 15%–30%
  • Silicon Dioxide (SiO₂)
  • Aluminum Oxide (Al₂O₃)
  • Iron Oxide (Fe₂O₃)
• Combined SiO₂ + Al₂O₃ + Fe₂O₃: Typically ≥50%
• Loss on Ignition (LOI): Typically ≤6% (grade dependent)
• Free Lime Content: Present (self-cementing property)
• Fineness: Typically 65%–75% passing 45-micron sieve
• Form: Fine powder
• Color: Light grey to tan
• Bulk Density: Approx. 1.0–1.4 MT/m³
• Moisture Content: Low; controlled for bulk handling
• Standards Compliance: Conforms to ASTM C618 Class C (subject to batch certification)
• Packaging Options:
  • Bulk tanker loading
  • 1 MT jumbo bags
  • 25–50 kg bags (on request)
• Shelf Life: Indefinite when stored in dry, sealed conditions

3. Core Industrial Applications

Primary Industries

• Ready-mix concrete production
• Cement manufacturing
• Infrastructure and road construction
• Precast concrete manufacturing

Operational Use Cases

• Partial replacement of Portland cement in concrete mixes
• Production of blended cement
• Soil stabilization and base material treatment
• Roller-compacted concrete (RCC) for dams and pavements

Performance & Cost Advantages

Class C Fly Ash enhances early-age strength development due to its higher calcium content, making it suitable for fast-track construction projects. It improves workability, reduces heat of hydration, and enhances sulfate resistance in concrete systems.

Compared to 100% Portland cement mixes, incorporating Class C Fly Ash reduces clinker usage, lowers material costs, and decreases CO₂ emissions. Its self-cementing properties provide added structural performance in soil stabilization and mass concrete applications, delivering both economic and technical advantages.

4. Competitive Advantages

• Quality Consistency: Controlled sourcing from established power generation facilities with batch testing and certification.
• Supply Reliability: Stable, high-volume availability suitable for long-term infrastructure projects.
• Logistics Capability: Bulk tanker transport and containerized export solutions for domestic and international markets.
• Price Competitiveness: Cost-effective alternative to clinker and Portland cement components.
• Sustainability Benefits: Reduces carbon footprint in concrete production and supports circular utilization of industrial by-products.
• Technical Documentation: Full chemical analysis, test reports, and compliance certificates available upon request.

Fly Ash – Class C is positioned as a strategic procurement solution for construction and cement producers seeking cost optimization, enhanced material performance, and sustainable infrastructure development.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): Bulk 20 MT
• Loading Capacity:
  • 20ft Container: Approx. 20–25 MT
  • 40ft Container: Approx. 25–28 MT (subject to transport regulations)

Long-term supply contracts and volume-based pricing agreements are available for industrial buyers.