Used Coffee Grounds Make For Stronger Concrete【■全メディア(倉庫)■】This article is from the coffee website Sprudge at http://sprudge.com. This is the RSS feed version. It's stronger and more eco-friendly than traditional concrete.2023.08.25This article is from the coffee website Sprudge at http://sprudge.com. This is the RSS feed version. It's stronger and more eco-friendly than traditional concrete.