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![](https://www.birdsoutsidemywindow.org/wp-content/uploads/2023/09/ground_coffee_20230924_rsz_kms.jpg)
24 September 2023
A new study from Australia has found that adding used coffee grounds to concrete makes it 30% stronger!
![](https://www.birdsoutsidemywindow.org/wp-content/uploads/2023/09/concrete-block_wiki.jpg)
To prepare it for concrete, they collected already-used coffee grounds and turned them into biochar, using a low-energy process without oxygen at 350 degrees Celsius.
![](https://www.birdsoutsidemywindow.org/wp-content/uploads/2023/09/coffee_grounds_20230924_rsz_kms.jpg)
Not only did coffee make the concrete 30% stronger but this meant that the used grounds did not go to a landfill.
If the idea catches on, coffee will reduce the need for so much sand in concrete …
![](https://www.birdsoutsidemywindow.org/wp-content/uploads/2023/09/portable_concrete_mixing_plaint_larry-d-moore-wiki.jpg)
… which will reduce the need to mine so much sand, a finite resource.
![](https://www.birdsoutsidemywindow.org/wp-content/uploads/2023/09/sand-mine-landscape-wiki.jpg)
Will the piles of sand at concrete plants become piles of biochar coffee? Image it at Heidelburg Cement / Lindy Paving along the Parkway East near Uptown, satellite view below.
Google satellite view of Heidelburg Materials Concrete / Lindy Paving, 2nd Avenue, Pittsburgh
Read more about this innovation at Science Daily: Coffee Offers Performance Boost for Concrete.
I hope it catches on!
(credits in the captions)
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