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It looks like a potato. It could provide a good emergency shelter in time of disaster. But it must be pretty heavy--not really for typical camping out.
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Such devices are portable. We had a friend we worked with who built a concrete boat as an ocean-going vessel for an around-the-world tour. I guess it is easy to build and very seaworthy. The largest was the 345ft long, 48ft wide, 26ft 7in high Gu Tian.

Building with concrete is easy - but the chemistry must be engineered correctly with the right support structure.
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This is an interesting video, which shows that mimicking nature can have some nice side effects.

See How Termites Inspired a Building That Can Cool Itself | National Geographic


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Have a Gneiss Day!
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Looks like the old marshal is about to be replaced by a new bad-boy.   Spiteful

Quote:So Long TNT, There's a New Explosive in Town: Bis-oxadiazole could replace TNT and other explosives in military ordnance.

The chemistry of explosives is a delicate matter. A little less carbon, a little more nitrogen, and the right amount of oxygen can transform a relatively inert substance into quite the showstopper.

For more than 100 years, TNT has been the premier combination of chemicals for blowing things up, and it's even used as a metric to measure the yield of nuclear explosions and other monumental blasts. But new research out of Los Alamos National Laboratory and the Army Research Laboratory has discovered a new chemical, bis-oxadiazole (C6H4N6O8), that has many of the advantages of TNT, is thought to be less toxic to produce, and makes a bigger bang.

"It would be about 1.5 times the power of TNT," says David Chavez, an explosives chemist at Los Alamos who worked on the new molecule. "So fairly energetic, quite a nice improvement compared to TNT."
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Have a Gneiss Day!
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