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UK scientists developed a way to produce low carbon cement 英国科学家研究出低排放再生水泥的方法


UK scientists developed a way to produce low carbon cement 英国科学家研究出低排放再生水泥的方法


Concrete is everywhere, but it is very polluting.


Making the cement that binds it all together produces lots of CO2.


A team from Cambridge University have a plan to sidestep all of that polluting chemistry by reactivating this stuff: used cement.


Now it has been done before in cement kilns.


The Cambridge breakthrough was to realise they could piggyback on another heavy industry: steel recycling.


The electric arc furnaces used for steel recycling are hot enough and can be powered with renewable energy.


And the composition of used cement is almost exactly the same as chemicals steelmakers add to their furnaces to stop impurities.


So using it instead could cut costs and reduce emissions for steelmakers too. But will the process work?


Dr Cyrille Dunant, University of Cambridge
"That's the first sample of low carbon Portland cement produced in an electric arc furnace, ever, ever. "

西里尔·杜南特博士     英国剑桥大学

Justin Rowlatt, BBC reporter
"So, this is a world first."

贾斯汀·罗拉特     BBC 通讯员

Dr Cyrille Dunant, University of Cambridge
"This is a world first."

西里尔·杜南特博士     英国剑桥大学

He believes it could mark the beginning of a revolution.


Dr Cyrille Dunant, University of Cambridge
"If you can make the cement with no carbon, that means we can keep on living with all the stuff we expect. It's quite important to be able to make cement with no carbon in the future."

西里尔·杜南特博士     英国剑桥大学

The first full-scale trials will be in Cardiff later this week. The hope is this low carbon cement could meet up to a quarter of UK demand.


And because so much steel is now recycled, the process could be rolled out all over the world, massively reducing emissions from one of the world's most polluting materials.


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