Only some sands are suitable for the construction industry, for example for making concrete. Grains of desert sand are rounded by being blown in the wind, and for this reason do not produce solid concrete, unlike the rough sand from the sea.

https://en.wikipedia.org/wiki/Sand#Resources_and_environmental_concerns

[–] Wxnzxn@lemmy.ml 3 points 1 year ago (1 children)

So am I correct in guessing it at least (if quartz sand) can be used for microchips and the likes? I hope the rough sands aren't extrated just to be used in something, were other, less scarce sands could be used - but I could at least imagine stuff like economy of scale, existing infrastructure and special interest of the established industries could actually cause that.

[–] infeeeee@lemm.ee 7 points 1 year ago* (last edited 1 year ago)

But the amount needed for chips is several order of magnitude lower than what needed for concrete. If you see the square, usage diagram on the lower left, chips aren't even visible, so small is needed.

You can also use it for glass, which is on the diagram, there is this old video of a guy 3D printing things with only solar power in the Sahara:

original video: https://www.youtube.com/watch?v=ptUj8JRAYu8
background: https://www.youtube.com/watch?v=kpunlLk4fgE

We don't really have an economical alternative to concrete (yet) in a lot of usecases, e.g. building foundations, substructure everywhere on the earth is made from concrete. On superstructure there are other options as structural material, e.g. wood, steel, but those don't like to be put in soil.

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