The Roots of Progress

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In which I answer your questions about cement
newsletter.rootsofprogress.org

In which I answer your questions about cement

Jason Crawford
Oct 31, 2019
Share this post
In which I answer your questions about cement
newsletter.rootsofprogress.org

I recently turned an old post on cement into a surprisingly popular Twitter thread:

Many people replied with questions that I couldn’t answer to my satisfaction, such as:

  • What was it about the volcanic ash the Romans added to their cement that made it set underwater? How does that work?

  • Why was Portland cement stronger than previous cements?

  • If cement re-absorbs CO2 from the air, the lime cycle would seem to be carbon-neutral; why is cement cited as a major CO2 contributor?

  • Did the Romans have a lost formula for cement that we’ve been unable to surpass?

So I went back for another round of research. Here’s what I found…


Read the full post: https://rootsofprogress.org/cement-redux

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In which I answer your questions about cement
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