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A comment on Smashing idea: how East Germany invented 'unbreakable' drinking glasses. Parent comment

Re:Smashing idea: how East Germany invented 'unbreakable' dr... by toxik on Wednesday August 07, 2024 @09:34AM (#41181309)
IIRC concrete aggregate should be jagged so that it interlocks with itself. You actually can't just use any old sand, you need sharp sand, which is an increasingly scarce resource.
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Re:Smashing idea: how East Germany invented 'unbreakable' dr... by defrost on Wednesday August 07, 2024 @09:40AM (#41181377)
My bad .. mentally insert more commas and juggle the clauses :-)

The tumbling was only meant to be applied to application requiring rounded grit, you're correct that concrete and other uses might prefer jagged.

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Re:Smashing idea: how East Germany invented 'unbreakable' dr... by inglor_cz on Wednesday August 07, 2024 @11:17AM (#41182308)
"you need sharp sand"

Hmm, practical concerns about acquisition aside, would lunar dust work?

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Re:Smashing idea: how East Germany invented 'unbreakable' dr... by jasomill on Wednesday August 07, 2024 @06:08PM (#41186089)
Yes:

https://en.wikipedia.org/wiki/Lunarcrete

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