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December 18, 2023

Revolutionising Concrete: Approved Recipe Change Promises Massive Carbon Emission Reductions

Revolutionising Concrete: Approved Recipe Change Promises Massive Carbon Emission Reductions


The British Standards Institution (BSI) has approved significant changes to the standards governing concrete production. This approved alteration to the concrete 'recipe' has the potential to revolutionise the industry, with the promise of slashing 1 million tonnes of carbon dioxide emissions annually if embraced across all UK construction sites.

The Shift in Concrete Composition

The heart of the change lies in the novel composition of the concrete mixture. The revised 'recipe' combines finely ground limestone sourced from UK quarries with other materials like fly ash and ground granulated blast furnace slag. This innovative approach is a strategic response to the environmental challenges posed by the concrete and cement manufacturing industry, which currently contributes 7.7 million tonnes of carbon dioxide emissions annually, accounting for 1.5% of total carbon emissions in the UK.

Carbon Emission Reduction Potential

The majority of carbon emissions in concrete production are linked to cement manufacturing. By incorporating additives such as limestone powder into the mixture, the industry can significantly reduce its reliance on traditional cement, paving the way for the creation of lower carbon concrete. This not only aligns with global sustainability goals but also positions the construction sector as a key player in mitigating climate change impacts.

New Standards in Action

With the newly approved standards, the traditional CEM I content in concrete can be substituted with up to 20% limestone powder. This presents a remarkable opportunity for construction projects to adopt a more eco-friendly approach without compromising structural integrity or performance. The standards provide a clear framework for achieving a balance between structural requirements and environmental responsibility.

Environmental Impact

Implementing these changes on a wide scale has the potential to yield a substantial reduction in carbon emissions associated with concrete production. The one million tonnes of carbon dioxide emissions saved annually, if universally adopted, would mark a significant stride towards the construction industry's commitment to sustainability and a lower carbon footprint.


The approval of changes to the concrete 'recipe' by BSI signifies a pivotal moment in the construction industry's journey towards eco-conscious practices. The integration of finely ground limestone and other additives not only promises to cut down carbon emissions but also sets a precedent for innovative thinking within the sector. As construction companies and professionals embrace these new standards, the industry takes a decisive step towards a more sustainable and environmentally responsible future.

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