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I bet sourcing all that sand will be a bigger problem than they expect as sand is a rare and nonrenewable resource that's heavily in demand for concrete and sou

by bragr 4y ago

I bet sourcing all that sand will be a bigger problem than they expect as sand is a rare and nonrenewable resource that's heavily in demand for concrete and sourcing it has all sorts of environmental issues of its own. They should look into replacing that with something that's also cheap waste. Maybe crushed glass would work?

ProtoMathics 4y ago
glass is made from sand, there is less glass in world then sand, and again, why lock more precious commodity in another product which we are already making from other less precious commodity ?
- max599 4y ago
  It's the shape of the grains of sand that's bad for concrete, not the chemical composition. It gets less angular and more round when it moves in the desert and it doesn't bound well with cement. Sand that is good for concrete is rare and making it is expensive. The "bad" sand that is common everywhere is still perfect to make glass.
Dylan16807 4y ago
Certain shapes of sand are rare compared to global construction, sand in general isn't. Unclear what this method needs.
once_inc 4y ago
twenty-five percent of Africa is literally covered in sand. Sand comes in different granularity and compositions, but for concrete this is often irrelevant.
- formerly_proven 4y ago
  Actually it matters quite a bit. That's why countries which are literally filled with desert sand import river/sea sand for their construction. Finding a way to make desert sand usable for construction concrete would be significant.
- valdiorn 4y ago
  Uh, for concrete the granularity and composition is VERY important. In fact it's one of the most important parameters you can tweak in a concrete mix. To the point that weird stuff like this happens quite frequently: https://www.quora.com/Is-it-true-that-Saudi-Arabia-imports-sands-from-Australia-If-so-why https://www.quora.com/Is-it-true-that-Saudi-Arabia-imports-s... My local DIY store here in the UK carries some 8 different types of sand, all for different purposes.

by bragr 4y ago

ProtoMathics 4y ago

glass is made from sand, there is less glass in world then sand, and again, why lock more precious commodity in another product which we are already making from other less precious commodity ?

max599 4y ago
It's the shape of the grains of sand that's bad for concrete, not the chemical composition. It gets less angular and more round when it moves in the desert and it doesn't bound well with cement. Sand that is good for concrete is rare and making it is expensive. The "bad" sand that is common everywhere is still perfect to make glass.

Dylan16807 4y ago

Certain shapes of sand are rare compared to global construction, sand in general isn't. Unclear what this method needs.

once_inc 4y ago

twenty-five percent of Africa is literally covered in sand. Sand comes in different granularity and compositions, but for concrete this is often irrelevant.

formerly_proven 4y ago
Actually it matters quite a bit. That's why countries which are literally filled with desert sand import river/sea sand for their construction. Finding a way to make desert sand usable for construction concrete would be significant.
valdiorn 4y ago
Uh, for concrete the granularity and composition is VERY important. In fact it's one of the most important parameters you can tweak in a concrete mix. To the point that weird stuff like this happens quite frequently: https://www.quora.com/Is-it-true-that-Saudi-Arabia-imports-sands-from-Australia-If-so-why https://www.quora.com/Is-it-true-that-Saudi-Arabia-imports-s... My local DIY store here in the UK carries some 8 different types of sand, all for different purposes.