How to Make Roman Concrete (4 Different Materials, 4 Different Strengths)

Comments · 1K

• HT

  @htme · 5 years ago · pinned

  Get 20% off your first monthly box when you sign up at <a href="http://bspk.me/how2">http://bspk.me/how2</a> and use promo code EVERYTHING20 at checkout!

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• AS

  @aster5977 · 5 years ago

  This series is like Journey Mode in terraria, where you have to get X amount before unlocking an infinite supply

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• SI

  @SirBoden · 5 years ago (edited)

  Lesson #1: &nbsp;Don’t use round rocks in concrete.<br><br>Roman cement is not used for its strength but its resilience to weathering as it cures over 30-50 years. A crush test is testing the wrong property.

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• SI

  @sirflimflam · 5 years ago

  The professionally made red brick was at a bit of a disadvantage since you had it resting on a small stone in the &nbsp;back, creating a pivot point and a good place to snap. If it were laying flat I imagine it would have stood a better chance at breaking until higher pressures were applied.

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• RO

  @robertjeffery3237 · 5 years ago

  As someone who tested concrete for a living, I really wish you would revisit this using a modern testing lab and the advice of a professional engineer as to how to make your samples, and how long to cure your concrete. Modern concrete is designed for a 28 day ultimate strength but it will continue to gain strength (asymptoticly) &nbsp;for 56 years or more. I would be pleased to collaborate with you concerning modern and ancient building materials.

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• EM

  @EmmaAppleBerry · 5 years ago

  You: makes a bulletproof chest plate without even trying<br>Me: looks for my phone while im holding it

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• SE

  @sevandor · 5 years ago

  I remember reading that the seawater is supposed to be used when making, not as a later soak. Can you try that recipe too? I&apos;d love to see what happens!

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• PR

  @princecharon · 5 years ago

  The version I read fairly recently (not sure where, though) was that the water they used for Roman concrete was seawater.

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• DO

  @dondelabruce6054 · 5 years ago

  10 weeks later: &quot;In the 1960s they used this kind of primitive tools to shoot a man to the moon. See if we can reclaim this ancient technology for our own moon mission!&quot;

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• MO

  @MORNINGSTAR827 · 5 years ago (edited)

  i wonder what crap he will have to go through when he gets to the steam area he will have to build a fricken train XD

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• SY

  @SyntacticOperator · 5 years ago

  He needs to redo the factory brick test- it was sitting on something that caused uneven pressure, and premature failure.

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• LO

  @lokilyesmyth · 5 years ago (edited)

  The pozzolan ash was used for the underwater concrete they used. For the above ground concrete they used specific types of ash ( harena fossicia and carbunculus) that had to be freshly mined to make sure it was chemically active. <br>You can try to calcine the ash you have to see if you can get a reaction. The aqueducts were lined with one part lime to three parts testa— underfired clay tiles milled to a powder. Essentially calcined clay that contained a sodium or potassium containing mineral used as a flux.

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