Once upon a time when I was an engineer at a concrete company we tried this and not only was the quality of the concrete apparently lower it required more chemical additives to set properly kind of negating the benefits. IIRC there was also an industry presentation at a conference we attended that showed that once the concrete wore down or was broken up which inevitable with any major job it released the CO2.
The production of cement for concrete is still one of the largest contributors to GHG emissions out there and without fixing that portion of the equation the concrete industry will still be a problem
rachman77 t1_jdbwfyu wrote
Reply to An Arizona plant will pull CO2 from the air and trap it in concrete by captainquirk
Once upon a time when I was an engineer at a concrete company we tried this and not only was the quality of the concrete apparently lower it required more chemical additives to set properly kind of negating the benefits. IIRC there was also an industry presentation at a conference we attended that showed that once the concrete wore down or was broken up which inevitable with any major job it released the CO2.
The production of cement for concrete is still one of the largest contributors to GHG emissions out there and without fixing that portion of the equation the concrete industry will still be a problem