turns out coffee not only gives us humans a boost, it can also make concrete 30% stronger

who would have thought that the ingredient that RMIT university engineers found to make concrete stronger is roasted used coffee grounds?

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Nathan Dumlao ,Shannon Kilmartin Lynch ,Mohammad Saberian ,Guomin Kevin Zhang ,Rajeev Roychand ,Jie Li ,Chun Qing Li , ,Professor Guomin ,Professor Chun Qing ,