GGBFS Supplier — S75, S95 & S105
Ground slag for ready-mix, precast, marine and mass concrete. Select the activity grade and governing standard, then verify strength activity, Blaine, glass content and moisture on the batch COA.
- Standards
- ASTM C989 / EN 15167 / GB/T 18046
- Grades
- S75 / S95 / S105 and Grade 80 / 100 / 120
- MOQ
- 1 FCL recommended; bulk orders by route
- Packaging
- Jumbo bags, bulk vessel or container loading
- Lead time
- 15-25 days after PO confirmation
- Trade terms
- FOB · CIF · CFR
GGBFS grades: S75, S95 and S105
GGBFS grade is selected by slag activity index, fineness and the governing standard. The GB/T to ASTM labels below are useful commercial cross-references; the exact limits differ, so state both the standard and grade on the purchase order.
GGBFS S75 (ASTM C989 Grade 80)
Entry grade: 28-day slag activity index ≥ 75%, Blaine fineness ≥ 350 m²/kg, glass content ≥ 85% and moisture ≤ 1.0%. Suited to mass concrete, foundations and general blended cement where cost reduction, sulfate resistance and lower heat of hydration matter more than high early strength.
GGBFS S95 (ASTM C989 Grade 100)
The workhorse grade: 7-day activity index ≥ 75%, 28-day ≥ 95%, Blaine ≥ 400 m²/kg, glass content ≥ 85% and moisture ≤ 1.0%. The default choice for ready-mix and precast, commonly at 30–50% OPC replacement.
GGBFS S105 (ASTM C989 Grade 120)
High-activity grade: 7-day activity index ≥ 95%, 28-day ≥ 115% in the published Miningsun table, Blaine ≥ 450 m²/kg, glass content ≥ 85% and moisture ≤ 1.0%. Used for high-performance, marine and high-durability concrete requiring high later strength and low permeability.
| Grade | 7-day activity | 28-day activity | Blaine | Typical selection |
|---|---|---|---|---|
| S75 / Grade 80 | — | ≥ 75% | ≥ 350 m²/kg | Mass concrete and general blended cement |
| S95 / Grade 100 | ≥ 75% | ≥ 95% | ≥ 400 m²/kg | Ready-mix and precast concrete |
| S105 / Grade 120 | ≥ 95% | ≥ 115% | ≥ 450 m²/kg | High-performance and marine concrete |
Where buyers use GGBFS
Ready-mix, precast, marine concrete and mass concrete.
Ready-mix concrete
General-purpose slag replacement for durable commercial concrete.
Precast products
Controlled strength development and improved long-term performance.
Marine structures
Lower permeability and improved resistance in aggressive exposure.
Mass concrete
Lower heat of hydration for large pours and foundations.
Packaging, logistics and documents
Confirm the grade, quantity, destination and required document set before comparing delivered prices.
Supply details
- Packaging
- Jumbo bags, bulk vessel or container loading
- MOQ
- 1 FCL recommended; bulk orders by route
- Loading
- FOB major China ports
- Lead time
- 15-25 days after PO confirmation
- Incoterms
- FOB · CIF · CFR
Quality documents
2 public PDFsThe public supplier COA is dated 20 Nov 2025 and does not state an S75/S95/S105 grade. Use it as a sample only and verify the requested grade on the current lot COA.
MSDS1 file
Buyer questions
Can you quote bulk and bagged GGBFS?
Yes. Packing and loading route are quoted by destination, volume and handling method.
Why are only PDF files shown?
Only available PDF documents are public; unstamped draft files stay off the website.
What is required for an accurate quote?
Send the grade or application, quantity, destination port, packing preference, governing standard and required documents.
Send the grade, quantity and destination port.
We will confirm price, packing, lead time and available batch documents for GGBFS.