r/science • u/mvea Professor | Medicine • Nov 03 '19

Chemistry Scientists replaced 40 percent of cement with rice husk cinder, limestone crushing waste, and silica sand, giving concrete a rubber-like quality, six to nine times more crack-resistant than regular concrete. It self-seals, replaces cement with plentiful waste products, and should be cheaper to use.

https://newatlas.com/materials/rubbery-crack-resistant-cement/
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u/LJDAKM Nov 03 '19 edited Nov 03 '19

A solar furnace is a series of parabolic mirrors that focus the suns energy onto a crucible chamber. The one I’m familiar with has a crucible about the size of a 5 gal bucket. It’s been several years since I worked on the project but they could get some pretty impressive temps out of the thing.

*edit - here’s a link

https://www.valpo.edu/college-of-engineering/facilities/solar-research-facility/

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u/wolfx7d Nov 03 '19

Didn't know Vpo U did anything with that much clout. I almost went there since I live so close, but I never hear anything about the place. Good to know.