![coffee offers performance boost for concrete coffee offers performance boost for concrete](https://utterbuzz.com/wp-content/uploads/2023/08/coffee-offers-performance-boost-for-concrete-640x384.jpg)
Engineers in Australia have found a way of making stronger concrete with roasted used-coffee grounds, to give the drink-additive a ‘double shot’ at life and reduce waste going to landfills. The team developed a technique to make concrete 30% stronger by turning waste coffee grounds into biochar, using a low-energy process without oxygen at 350 degrees Celsius.