Fly Ash
Fly Ash
Fly ash is a residual product of coal combustion, with its specific characteristics determined by the type of coal used. Class C fly ash originates from younger lignite or subbituminous coal and is inherently self-cementing and pozzolanic, meaning it hardens when mixed with water alone. In contrast, Class F fly ash is produced from older anthracite or bituminous coal; while also pozzolanic, it requires water and an additional cementing agent—such as Portland cement or lime—to initiate the hardening process. Both classifications are widely utilized in construction materials due to these effective binding capabilities.
Miningsun is investing in processing technologies to harvest, classify, and supply specification-grade fly ash for concrete applications worldwide, reducing reliance on traditional cement manufacturing.
Today we serve global markets including the Middle East, Southeast Asia, and the Americas, where we export consistent quality fly ash via bulk vessels and containers. We also offer bagged fly ash in 25 kg paper bags and 1,000 kg/1.5 MT super sacks.
The use of fly ash in concrete can contribute to sustainable construction by conserving natural resources and lowering energy consumption and emissions. Recycling coal ash is an economical and sustainable solution. Coal ash is encapsulated for beneficial use as a supplementary cementitious material (SCM) in concrete or other industrial products. It improves the durability of concrete and prolongs the lifecycle of our roads, buildings, bridges, and other important structures.
12 Benefits of Fly Ash in Concrete
Replacing a portion of cement with performance-enhancing fly ash contributes to short-term and long-term benefits in concrete:
Technical Expertise
Our technical team provides expertise to concrete producers globally. Tailored quality control programs are based on a selective collection of the most consistent quality material for our customers. Our team provides technical support to help customers achieve an optimal concrete mix for specific applications and weather conditions.
Bagged Fly Ash
Miningsun Fly Ash, a consistent, low LOI, Class F fly ash, is offered in convenient sizes for small-batch, on-site concrete mixing. Our bagged fly ash is available in 25 kg PP bags or 1.5 MT super sacks for projects that do not have access to pneumatic loads or product silos.
25 kg bags | 1.5 MT super sacks
This high quality, specification-grade fly ash is offered year-round for use as a supplementary cementitious material in concrete and concrete products.
Premium Grade Fly Ash
Miningsun Premium Fly Ash is a high-quality, specification-grade fly ash for use as a supplementary cementitious material in concrete and concrete products. Coal ash from selected sources is transformed into a consistent, low LOI, Class F fly ash. Reclaiming coal ash provides year-round availability of this post-industrial, recycled material for the construction industry.
Miningsun Premium Fly Ash will not affect the ability of your air-entraining agent to build and maintain an air void system in concrete. Independent testing shows that concrete made with our Premium Ash has essentially the same air dosage rates as plain Portland cement mixes.
Ideal Applications
- Ready Mixed Concrete
- Precast Concrete
- Concrete Paving
- Prestressed Concrete
- Asphalt Paving
- Block, Pipe, Vaults, etc.
- CLSM / Flowable Fill
- Ternary Concrete Mixes
- Cellular Concrete
- Polymer Concrete
Typical Specifications
Our Class F fly ash meets the rigorous requirements of international standards. Below is a summary of typical physical and chemical properties.
| Parameter | Test Standard | Class F Requirement | Miningsun Typical Value |
|---|---|---|---|
| SiO₂ + Al₂O₃ + Fe₂O₃ | ASTM C618 / GB/T 1596 | ≥ 70% | ≥ 75% |
| SiO₂ Content | XRF | — | 50 – 65% |
| CaO Content | XRF | < 10% (Class F) | ≤ 8% |
| Loss on Ignition (LOI) | ASTM C618 / EN 196-2 | ≤ 6% | ≤ 5% |
| SO₃ Content | ASTM C618 | ≤ 5% | ≤ 1.5% |
| Moisture Content | ASTM C618 | ≤ 3% | ≤ 1% |
| Fineness (retained on 45 µm sieve) | ASTM C618 / GB/T 1596 | ≤ 34% | ≤ 20% |
| Strength Activity Index (28d) | ASTM C618 | ≥ 75% | ≥ 80% |
* Values are typical and may vary by batch. Certificates of Analysis available upon request. Classification per ASTM C618.
Documentation
Download our technical documents to verify product performance and safety.