How Much CO₂ Can Be Saved Using GGBS from China?

We commissioned the University of Salford to evaluate the low-carbon potential of imported cement alternatives in the construction sector. This report will provide a comprehensive analysis of the environmental impact of using GGBS or silica fume, including an assessment of the carbon savings associated with these materials compared to traditional Portland cement.

You can read the insight and full report here:

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CO₂ Savings Per Tonne of Cement Replaced by GGBS

The production of traditional Portland cement is a significant source of CO₂ emissions, releasing approximately 0.8 tonnes of CO₂ per tonne of cement produced. In contrast, GGBS production emits only about 0.05 tonnes of CO₂ per tonne, mainly from grinding and transportation. This results in a CO₂ savings of approximately 0.75 tonnes per tonne of cement replaced with GGBS.

CO₂ Emissions from Bulk Shipping to Europe

Since GGBS is often shipped internationally, it is important to consider transportation emissions. Bulk shipping emissions are approximately 0.015 tonnes of CO₂ per tonne per 1,000 miles traveled. Based on distances from China to key European markets, the estimated net CO₂ savings per tonne of GGBS used are:

• United Kingdom (~11,000 miles shipping): 0.585 tonnes of CO₂ saved per tonne of GGBS

• Germany (~10,500 miles shipping): 0.5925 tonnes of CO₂ saved per tonne of GGBS

• France (~10,800 miles shipping): 0.588 tonnes of CO₂ saved per tonne of GGBS

• Netherlands (~10,700 miles shipping): 0.5895 tonnes of CO₂ saved per tonne of GGBS

• Spain (~11,500 miles shipping): 0.5775 tonnes of CO₂ saved per tonne of GGBS

The Bigger Picture

Using GGBS as a sustainable alternative to cement significantly reduces carbon emissions. Even after accounting for shipping to European markets, the net CO₂ savings remain substantial, making GGBS a viable solution for low-carbon construction. Once the LCA report is completed, we will provide more detailed insights into the full environmental impact of our product.