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#cement

1 post1 participant0 posts today
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anlomedad

Learned today:
Cement -making, which involves high heat, incurs 9% of the annual global CO2 emissions.
Roman #cement endured 2000 years, and counting.
"Ours" lasts merely 50-150 years.
Why is that?
Ours crumbles because little fissures are widened by rain water.
The Roman mix contains lotsa tiny calcium lumps. When fissures occur and rain enters them, it dissolves the calcium crumbs and this "dough" smears across the gaps. Case closed.

Heard in a curious podcast episode by a Noam Hassenfeld.

Also learned: when scientists drilled for sediment cores in 2022/2023 around Santorini and the submarine #volcano , the drill got stuck often, and 3 times, they had to use explosives to get it free. One reason: a Roman cement structure on the sea floor !
Thomas Ronge, cli-sci on this #IOPD expedition, posted it yesterday on Bluesky.

Public
WordofTheHour

#cement : any substance used for making bodies adhere to each other, as mortar, glue, etc

- French: ciment

- German: der Zement, zementieren

- Italian: cemento

- Portuguese: cimento

- Spanish: cemento

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CelloMom On Cars

"Production of #cement — the world’s most used commodity after water — currently produces 8 percent of global carbon dioxide emissions.

Researchers at the University of Michigan say they have devised a new electro-chemical approach that greatly reduces the amount of carbon dioxide released by the cement making process. They claim their process is low in cost and scalable."

cleantechnica.com/2025/01/12/m

CleanTechnica · Making Cement With Fewer The Carbon Emissions - CleanTechnicaResearchers at the University of Michigan have devised a new electro-chemical process to make low carbon cement.
Public
RDN

Production of calcium carbonate for cement by electrolysis in the presence of calcium silicate, instead of by heat decomposition of limestone, can potentially decrease the C02 released by the cement industry from 8% of annual global emissions to 3% or less.

Summary: techxplore.com/news/2025-01-su

Original paper: pubs.rsc.org/en/content/articl

Tech Xplore · Sustainable cement: An electrochemical process to help neutralize cement industry CO₂ emissionsBy Patricia DeLacey
#Science#ClimateChange#CO2
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