Coffee offers performance boost for concrete
【■ 検索対象 キーワード】 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.
