The production of GGBS generates very low levels of CO2 compared to traditional, Portland Cement production, which is regarded as a high-emissions production process. By repurposing a by-product of the iron industry, GGBS requires 20% less energy and produces 10% less CO2 during its production process compared to Portland Cement.
GGBS can replace 70% of Portland Cement in a concrete mix, and for every tonne of GGBS used in a concrete mix, the embodied CO2 levels are reduced by around 900kg compared to the use of one tonne of traditional Portland Cement.
As a by-product, the production of GGBS does not require any form of mineral extraction, and by repurposing a by-product GGBS production actively limits the amount of industry by-product going into landfill.
By helping to produce more durable structures, GGBS further reduces the environmental impact of concrete construction by reducing the amount of maintenance that structures require and extending overall structural lifespan.