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Sean Nash

Simple new process stores CO2 in concrete without compromising strength - 0 views

www.sciencedaily.com/...240626173558.htm

HSR HSR-2025 concrete materials science engineering physics chemistry potential research idea

shared by Sean Nash on 02 Jul 24 - No Cached
  • By using a carbonated -- rather than a still -- water-based solution during the concrete manufacturing process, a Northwestern University-led team of engineers has discovered a new way to store carbon dioxide (CO2) in the ubiquitous construction material.
  • Not only could the new process help sequester CO2 from the ever-warming atmosphere, it also results in concrete with uncompromised strength and durability.
  • "The cement and concrete industries significantly contribute to human-caused CO2 emissions,"
  • ...6 more annotations...
  • instead of injecting CO2 while mixing all the ingredients together, they first injected CO2 gas into water mixed with a small amount of cement powder. After mixing this carbonated suspension with the rest of the cement and aggregates, they achieved a concrete that actually absorbed CO2 during its manufacturing
  • After analyzing their carbonated concrete, Rotta Loria and his colleagues found its strength rivaled the durability of regular concrete.
  • based on our experiments, we show the strength might actually be even higher. We still need to test this further
    • Sean Nash
      Sean Nash on 02 Jul 24
       
      It is a good sign when you read: "We still need to test this further!"
  • It could be used in beams, slabs, columns, foundations -- everything we currently use concrete for."
  • "The findings of this research underline that although carbonation of cement-based materials is a well-known reaction, there is still room to further optimize the CO2 uptake through better understanding of the mechanisms tied to materials processing,"
  • Journal Reference: Xiaoxu Fu, Alexandre Guerini, Davide Zampini, Alessandro F. Rotta Loria. Storing CO2 while strengthening concrete by carbonating its cement in suspension. Communications Materials, 2024; 5 (1) DOI: 10.1038/s43246-024-00546-9
  • Sean Nash on 02 Jul 24
     
    Know anyone who works with concrete that might let you experiment? I had a student back in the day who did this. They incorporated plastic polymer beads into standard concrete molds for strength testing.
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