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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.
Sean Nash

Rocks beneath our feet could be key to carbon-neutral cement - 0 views

www.anthropocenemagazine.org/...-for-reducing-carbon-emissions

climatechange carbonsequestration carbondioxide concrete olivine peridot HSR HSR-2025 science environmental engineering chemistry potential research idea

shared by Sean Nash on 15 May 24 - No Cached
  • Sean Nash on 15 May 24
     
    This sort of thing isn't exactly my specialty, but I HAVE had a student do an award-winning project that dealt with engineered concrete...
Sean Nash

Q. What's the greener building material, fungus or concrete? - 0 views

www.anthropocenemagazine.org/...ng-material-fungus-or-concrete

fungi concrete electricity ecology environment green building materials science fungus HSR-2025 HSR environmental questions engineering physics chemistry biology potential research idea

shared by Sean Nash on 06 Jun 24 - No Cached
  • Sean Nash on 06 Jun 24
     
    This is more of a broad idea re: the use of living things as building materials - not so much detail in this specific article
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