Supplementary Cementitious Material
Slag
Ground Granulated Blast Furnace Slag (GGBFS) used as a supplementary cementitious material to improve concrete durability, workability, long-term performance, and sustainability. Commonly blended with cement for ready-mix, precast, marine, infrastructure, mass concrete, pavement, geo-stabilisation, and lower-carbon concrete applications. Available in bulk tanker loads and 1 tonne bulk bags.
Available formats
Bulk tanker loads, 1 tonne bulk bags.
Meets NZS 3122:2009
New Zealand cement standard
Batch Tested & Certified
By an IANZ-accredited laboratory
Lower-Carbon Profile
Supporting carbon data available
Product Documents Ready
SDS, BPIR, and Typical Test Result
Where it's used
Applications
Ready-Mix Concrete
Used as a supplementary cementitious material in ready-mix concrete to support workability, durability, and lower-carbon mix designs.
Precast Concrete
Suitable for precast concrete applications requiring improved long-term strength, finish, and durability.
Marine Structures
Supports concrete exposed to chloride conditions where improved durability and resistance are important.
Infrastructure Projects
Suitable for civil infrastructure, public works, and large-scale concrete applications.
Mass Concrete Pours
Helps reduce heat of hydration and supports long-term performance in mass concrete applications.
Pavements & Geo-Stabilisation
Used in pavement construction and geo-stabilisation applications where strength, durability, and binder performance are required.
Resources
Documentation
Access the key product documents for procurement, QA, compliance, safety, sustainability, and technical review.
Technical Data Sheet
Chemical, physical, and performance data for Summit Cement Slag.
Request from our teamSafety Data Sheet
Safety, handling, storage, hazard, and regulatory information.
Request from our teamBPIR Compliance
Building product information for Summit Cement Slag.
Request from our team
Performance
Typical test results
Selected typical test results for Slag.
| Property | Value |
|---|---|
| Conformance | ASTM C989 Grade 100 |
| Slag activity index - 7 day | 72.6% |
| Slag activity index - 28 day | 100% |
| Blaine fineness | 5200 cm²/g |
| Amount retained on 45 µm sieve | 3.5% |
| Air content of slag mortar | 6.2% |
| Mass density | 2.90 g/cm³ |
| Loss on ignition | 1.00% |
| Glass content | 95.2% |
| Moisture | 0.43% |
Typical results are indicative and should be read alongside the full Typical Test Result document.
More products
Related products
GP Cement Type I
Our flagship general purpose cement for everyday ready-mix, civil and trade work.
View product
GP Cement Type II
General purpose cement for structural, civil, precast, and commercial building applications.
View product
Quicklime
High-calcium quicklime for stabilisation, drying, pH adjustment, and industrial applications.
View productGet in touch
Need pricing, availability, or product documentation?
Talk to Summit Cement about supply formats, documentation, delivery options, and product suitability.