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Seashells turned to eco-friendly concrete
Updated On: 06 December, 2025 10:45 AM IST | London | Agencies
Researchers at the University of East London have discovered that discarded seashells, when processed into fine powder, can replace up to one-third of the cement used in concrete. The breakthrough offers a scalable way to cut carbon emissions, with the study showing a 36 per cent reduction in the material’s footprint
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Using scallop shells could reduce carbon emissions by 36 per cent. Pic/iStock
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Researchers at the University of East London (UEL) have found an extraordinary new purpose for discarded seashells. Once processed into a fine powder, shells can replace up to a third of the cement in concrete, offering a highly scalable method to reduce carbon output.
Cement, the binding agent in concrete, accounts for roughly 7 per cent of global carbon emissions. It is everywhere, its carbon footprint enormous. UEL’s study found that ground scallop shells — which typically end up in landfills or waste streams — can be substituted for cement, delivering a 36 per cent reduction in carbon emissions for the material.
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