Ecocem Joins Britpave
New Britpave member Ecocem is Europe’s largest independent producer of high performance, low carbon Ground Granulated Blastfurnace Slag (GGBS).
Ecocem’s highly qualified team of technicians aim to enhance and deliver a wide range of GGBS benefits which include:
- Leachate reduction
The pH of Ecocem GGBS is lower than that of cement (10-11 compared to 13+ for cement.) This lowers the pH of the stabilised matrix which reduced the solubility of the contaminants and minimises leaching.
- Lower permeability
The higher silica and lower lime content in Ecocem GGBS achieves a denser binder mixer formation resulting in lower porosity and improving physical immobilisation of contaminants.
- Increased long-term strength
Ecocem GGBS reaches a higher longer-term strength than ordinary Portland cement so extends the lifespan of a project.
- Resistance to sulphates and acids
Ecocem GGBS has replaced the use of Sulphate Resisting Portland Cement (SPRC) due to outstanding resistance to sulphates and acids. Ecocem GGBS can be used in all classes of aggressive ground conditions lists in the BRE Special Digest 1:2500 Concrete in Aggressive Ground Conditions.
- Lower environmental impact
The carbon footprint of Ecocem GGBS is just 42kg of CO2 per tonne, whereas ordinary Portland cement is 898kg CO2 per tonne. Ecocem GGBS has a third party verified Environmental Product Declaration.
- Security of supply
Ecocem’s strategic locations and long-term partnerships with the world’s largest steel producers ensures continuous supply of high quality GGBS around Europe.
GGBS is a by-product from iron producing blast furnaces. Blast furnaces operate at temperatures of up to 2,000 degrees Celsius and are fed with a carefully controlled mixture of iron ore, coke and limestone. The iron ore converts to iron, which sinks to the bottom of the furnace. The remaining materials form a slag that floats on top of the iron. The molten iron and slag are drawn off at regular intervals from the furnace. After being tapped from the furnace and separated from the iron, the slag is rapidly quenched in water. This process is known as granulation because it produces glassy granules, similar in appearance to coarse sand. These have excellent cementitious properties. The granulated slag is further processed by drying and then ground to a very fine powder in a mill.
GGBS can be used as a replacement for for Portland cement because it contains the same hydration process. The key characteristic of the material is its ability to immobilise contaminants, both chemically and physically. This makes it a well-regarded solution for soil improvement and for stabilising contaminants in soil due to high strength, increased durability and leachate reduction. In addition, by being a by-product GGBS has a low enviromental impact.
Strategically located across Europe, Ecocem operates four manufacturing facilities in France, Ireland and Holland with import terminals in the UK and Scandinavia. For further information visit: www.ecocem.ie