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Old 02-10-2023, 04:16 PM   #161 (permalink)
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I wasn't too surprised about building roads on styrofoam, they use spray insulation to raise foundations!

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Old 02-10-2023, 08:01 PM   #162 (permalink)
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Maybe I'm in the wrong forum???

Things haven't only changed since 2017, they're changed since permalink #155.

Quote:
https://news.mit.edu 2023 roman-concrete-durability-lime-casts-0106
Riddle solved: Why was Roman concrete so durable? | MIT News ...
6 Jan 2023Under closer examination, these ancient samples also contain small, distinctive, millimeter-scale bright white mineral features, which have been long recognized as a ubiquitous component of Roman concretes. These white chunks, often referred to as "lime clasts," originate from lime, another key component of the ancient concrete mix.

https://www.archaeology.org news 11122-230111-roman-concrete-quicklime
New Thoughts on the Secrets of Roman Concrete
11 Jan 2023The high temperatures produced by the use of quicklime formed white chunks in the concrete known as lime clasts. Tests of the quicklime concrete recipe suggest that when later exposed to...
When water reaches the lime clasts, it heals the cracks. I think someone with more energy than I can muster would cast compund-curved hexagonal panels that would interlock into a hemisphere that would las a thousand years.

The other thing to consider is Basalt instead of glass or Carbon fiber.

I'm surprised you didn't get a benefit from vibration.
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Old 05-28-2023, 12:16 AM   #163 (permalink)
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It's too bad OP will be busy with schooling.

This is a good overview of three building systems, but is inconclusive, other than that aircrete fails in compression as underfloor insulation.

It recomends steel mesh reinforcement where Basalt could be used. And no consideration of graphene amendments.
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Old 05-28-2023, 09:27 AM   #164 (permalink)
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Romans didn't use rebar. Everything they built was in compression which is limited by the compressability of the base rock. Pantheon with its ocular roof is prime example, used mostly continuous since built. Columns out front are made of solid marble which is probably the weakest thing of the structure.

Probably helps that Rome doesn't get much freezing
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Old 05-28-2023, 10:45 AM   #165 (permalink)
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Steel rebar and mesh wasn't used until the 18th Century.

I can't [easiiy] find any history, but burlap is also used as reinforcement and surface finish.

Adding the air doesn't help compressive strength. The video's conclusion is that 'ductcrete' is preferred to aircrete.
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Old 05-28-2023, 03:45 PM   #166 (permalink)
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Can we agree duckrete is wrong for various reasons?
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Old 05-28-2023, 08:18 PM   #167 (permalink)
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Not least because is associates to the University of Zero, here in Bluegene.

Oh, I guess there's a typo. I'll let it stand for continuity's sake.

Dustcrete.
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Old 06-11-2023, 12:41 PM   #168 (permalink)
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Where did I introduce my revolutionary Xtud?

I keep watching videos and then checking for a Robot Cantina update.

I sure hope Jimbo doesn't make us wait another week again!

YouTube suggested this and I felt excited--but then thought "Wait, did I already post about something just like that?" I got 65 seconds into it and it showed a BareNaked Tstud:


Except it had a cool logo burned into it.

I felt excited until I remembered we also discussed that years ago.

I cannot find anything about it and Google keeps giving me false positives, even when I put things in quotes, and tell it "No, I did not mean stud!"

I still have the diagrams that I made, but neither Google nor Tineye found them, although they just look like a K, an H, and an X:






I still love the idea and want to implement it one day, but isn't this just building with staggered 2x3s and 2x4s, with extra steps?
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Old 06-11-2023, 01:40 PM   #169 (permalink)
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In the X-version, when assembling it, do you install the orange or red dowels first?

I shall watch the plastic block video on your recommendation. I saw the thumbnail and was reminded of something that just looks much better.

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Old 06-11-2023, 04:38 PM   #170 (permalink)
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I watched the video. The use of French Cleats is neat, tapering them even moreso.

A six foot lintel covers most doors and windows. That 5/8" all-thread isn't cheap!

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