Hanson Cement is the only producer of Ground Granulated Blastfurnace Slag (ggbs) manufactured from UK iron production.
GGBS is a cementitious material whose main use is in concrete. It is manufactured from blast furnace slag, a by-product from the blast furnaces that manufacture iron.
The benefits from using ggbs in concrete, include:-
• greatly reduced carbon dioxide emissions
• significantley improved durability
• reduced early-age temperature rise
• lighter colour
Its major use is in ready-mixed concrete, with a third of all UK ready-mixed concrete deliveries containing ggbs. It is also used in site-batched and pre-cast concrete and in applications such as soil stabilisation.
GGBS can replace a substantial portion of the Portland cement content, generally about 50%, but sometimes up to 70% or more. The higher the proportion, the better is the durability.
Concrete containing ggbs is less permeable and chemically more stable than normal concrete. This enhances its resistance to many forms of deleterious attack, in particular:-
• disintegration due to sulfate attack
• chloride-related corrosion of reinforcement
• cracking caused by alkali silica reaction.
Fact Sheets
We have produced a series of fact sheets which explain in detail our product, its properties and many benefits.These can be downloaded as Acrobat files, either for viewing on screen or printing.
Production and use of ggbs, 200KB - GGBS and sustainability, 560KB
- GGBS and durability, 534KB
- GGBS and concrete properties, 564KB