버려지는 커피 '퍽'의 놀라운 기능, 콘크리트 '30%' 강화 효과

Humans produce about 4.4 billion tons of concrete every year. This process consumes about 8 billion tons of sand out of the 40-50 billion tons of sand used annually, which has led to a serious shortage of building materials in recent years. "Coffee grounds can be used as a silica substitute in the concrete production process that, when used in the right proportions, creates a much stronger chemical bond than sand alone," said the research team from RMIT University in Australia.

인간은 매년 약 44억 톤의 콘크리트를 생산한다. 이 과정에서 연간 사용되는 400억~500억 톤의 모래 중 약 80억 톤의 모래가 소비되며, 이로 인해 최근 몇 년 동안 건축 자재 부족 현상이 심각하게 발생하고 있다. 호주 RMIT 대학의 연구팀은 "커피 찌꺼기는 콘크리트 생산 과정에서 적절한 비율로 사용하면 모래만 사용하는 것보다 훨씬 더 강력한 화학적 결합을 생성하는 실리카 대체물로 사용될 수 있다"고 전했다.

Scientists strengthen concrete by 30 percent with used coffee grounds

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