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A comment on Cement recycling method could help solve one of the big climate challenges. Parent comment

Re:Cement recycling method could help solve one of the big c... by seventyone on Thursday May 23, 2024 @05:15PM (#40460007)
How does this address the emissions of concrete's curing process? There's no way you can have "zero emission concrete". I've seen proposed additives that will reduce the emissions during the curing process but that chemical reaction is going to have to happen regardless.
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Re:Cement recycling method could help solve one of the big c... by bobfromhuddle on Thursday May 23, 2024 @06:42PM (#40460759)
Concrete absorbs co2 while curing. It's the calcination process, where we heat limestone up until the co2 burns off, that has unavoidable emissions. Since this concrete is recycled, that's already happened.
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Re:Cement recycling method could help solve one of the big c... by kragen on Thursday May 23, 2024 @09:05PM (#40461816)
see https://news.ycombinator.com/item?id=40461810 for a correction
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Re:Cement recycling method could help solve one of the big c... by meindnoch on Friday May 24, 2024 @04:32AM (#40464173)
What are you even talking about? CO2 is absorbed during curing.
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