Fly Ash Supplier China | ASTM C618 Class F & Class C
Bulk and bagged fly ash from verified Chinese coal-fired power plants. ASTM C618 / GB/T 1596 compliant. FOB / CIF from major Chinese ports.
Supplied to ready-mix producers, precast manufacturers, cement blenders, and infrastructure contractors across the Middle East, Southeast Asia, Africa, and the Americas. Every shipment third-party tested — COA and MTC standard.
Low LOI, Consistent Quality
LOI ≤ 5% on Class F shipments. Selective sourcing from stable, long-term power plant partners — not spot market. Batch-to-batch variance tightly controlled.
Enhanced Durability for Demanding Projects
Proven resistance to ASR, sulfate attack, and chloride ingress. Widely specified for marine structures, mass concrete, and infrastructure with long service life requirements.
Verified Source, Stable Supply
Long-term offtake agreements with major Chinese power generators. Year-round availability. No supply disruptions from seasonal or market fluctuations.
Reduced Cement Cost Per m³
At 15–30% replacement rates, fly ash delivers measurable cost savings on cementitious content without compromising specification compliance or 28-day strength targets.
Flexible Packaging & Incoterms
25 kg PP bags, 1 MT / 1.5 MT jumbo bags, or bulk vessel loading. FOB, CIF, and CFR available from Tianjin, Qingdao, Shanghai, and Lianyungang.
Full Export Documentation
COA, MTC, CO, MSDS, and third-party inspection (SGS / BV / CIQ) available. All paperwork handled by our experienced export team.
Specifications by Grade
Class F is the primary export grade — low CaO, pozzolanic, widely specified internationally. Class C is available for customers requiring self-cementing properties or specific GB/T Category applications.
| Parameter | Test Standard | Class F | Class C |
|---|---|---|---|
| SiO₂ + Al₂O₃ + Fe₂O₃ (min) | ASTM C618 | ≥ 70% | ≥ 50% |
| SiO₂ Content (typical) | XRF | 50 – 65% | 35 – 50% |
| CaO Content (max) | XRF | ≤ 8% | 15 – 30% |
| Loss on Ignition (max) | ASTM C618 / EN 196-2 | ≤ 5% | ≤ 5% |
| SO₃ Content (max) | ASTM C618 | ≤ 1.5% | ≤ 5% |
| Moisture Content (max) | ASTM C618 | ≤ 1% | ≤ 1% |
| Fineness (45 µm sieve, max) | ASTM C618 / GB/T 1596 | ≤ 20% | ≤ 20% |
| Strength Activity Index (28d, min) | ASTM C618 | ≥ 80% | ≥ 80% |
* Typical values from production. Batch-specific COA issued with every shipment. Classification per ASTM C618 and GB/T 1596.
Where Our Customers Use Fly Ash
From mass concrete pours in the Middle East to precast production in Southeast Asia — fly ash is the workhorse SCM for volume-driven concrete operations worldwide.
Ready-Mix Concrete
Consistent 15–25% cement replacement. Improves workability, reduces heat, extends pump life.
Precast & Prestressed Concrete
Smoother surface finish, reduced efflorescence, earlier stripping where admixture-accelerated.
Mass Concrete & Foundations
Significantly reduced heat of hydration — critical for large pours, dam structures, and raft slabs.
Concrete Paving & Infrastructure
Long-term strength gain and enhanced sulfate resistance for roads, runways, and pavement slabs.
Cement Blending Plants
Direct bulk supply for PPC / PSC blending at clinker grinding and cement production facilities.
CLSM / Flowable Fill
High fly ash content mixes for trench backfill, utility bedding, and void-filling applications.
Packaging, Ports & Payment
Flexible packaging and incoterms to match your project scale, discharge facilities, and handling equipment.
Packaging Options
- 25 kg PP woven bags, palletized & shrink-wrapped
- 1,000 kg / 1,500 kg jumbo bags (FIBC) with PE liner
- Bulk loading into vessel holds (500+ MT per vessel)
- 20' / 40' container stuffing available
- Custom private-label bagging on request
Loading Ports
- Tianjin / Xingang Port (primary)
- Qingdao Port
- Shanghai Port
- Lianyungang Port
- Bulk vessels and container shipments arranged
Payment Terms
- 30% T/T deposit, 70% balance against B/L copy
- L/C at sight (irrevocable, from prime banks)
- D/P, D/A negotiable for established buyers
- Trial orders accepted to build long-term relationships
Documentation Provided
- Commercial Invoice & Packing List
- Bill of Lading (B/L)
- Certificate of Origin (CO / Form A / FORM E)
- Mill Test Certificate (MTC) & COA per shipment
- SGS / BV / CIQ third-party inspection on request
Direct-Source Supplier. Reliable Volumes.
China is among the world's largest producers of fly ash. Miningsun has long-term offtake agreements with major coal-fired power generators — giving our customers access to consistent, specification-grade material at competitive FOB pricing, year-round.
- Direct plant sourcing — long-term offtake contracts with established Chinese power generators, not trading company middlemen
- Third-party tested — ASTM C618 / GB/T 1596 compliance with COA on every shipment
- Stable pricing — quarterly fixed-price contracts available for repeat buyers and volume commitments
- Reliable lead times — 15–25 days from PO to vessel loading, consistently
- Multi-port loading — Tianjin, Qingdao, Shanghai, Lianyungang
- Full export documentation — CO, MTC, MSDS, SGS/BV inspection, fumigation as required
- Responsive sales team — quotes within 24 hours, English / Chinese supported
Frequently Asked Questions
What is the difference between Class F and Class C fly ash?
What is the typical dosage rate for fly ash in concrete?
What does LOI mean and why does it matter?
What is the minimum order quantity (MOQ) for fly ash?
Can fly ash be used to reduce alkali-silica reaction (ASR)?
Technical & Compliance Documents
Available to qualified buyers upon request — please specify grade (Class F / Class C) and estimated annual volume when reaching out.
Request a Quote or Sample
Tell us your required grade, annual volume, destination port, and packaging preference — we'll respond with a competitive FOB/CIF price within 24 hours.
Get a Price Or email us directly: info@miningsun.com · WhatsApp: +1 814 515 0096