From: Madeleine Cuff New Scientist 22nd May 2024:
Cement production is a huge source of carbon emissions with no green alternative, but a new process that uses waste from demolished buildings could dramatically reduce its climate impact.
A new technique can produce cement using waste from demolished buildings, which researchers say could save billions of tonnes of carbon by 2050.
“We have definitely proved that cement can be recycled into cement,” says Julian Allwood at the University of Cambridge. “We are on course for making cement with zero emissions, which is amazing.”
Producing cement is highly polluting – responsible for 7.5 per cent of total greenhouse gas emissions – but until now there was no known way to produce it at scale without impacts on the climate.
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