beer brick

Spent grains turn out to be a pretty good brick insulator

Research engineers found that bricks made with 5% spent brewing grains were nearly 30% better insulators, and just as strong as traditional bricks. The improved thermal performance comes from the tiny pockets of air trapped in the clay when the grains are mixed in. Polystyrene pellets achieve the same effect, and are used in some bricks currently.

More >> Gizmodo.

 

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