Melbourne is going to build roads from the coffee grounds

Road from coffee

Residents of Melbourne are known for their passion for coffee, which is sold here at every step. However, this generally harmless phenomenon has a negative side – a huge amount of coffee waste. On average, one city cafe throws out up to 150 kg of the hills per week.

Professor of the local Swinburn University – Arul Arulrai once asked himself: why not use coffee wastes as a component of the road surface? The team under his leadership gathered coffee grounds from all the surrounding institutions. After a careful five-day drying in a special oven at a temperature of 50 ° C, coffee wastes were filtered off, the lumps were removed, and then mixed with the waste of steel production – slag at a ratio of 7: 3.

Further, a liquid alkaline solution was added to the mixture, which bound its components. As a result, strong cylindrical blocks have been made that can be used as a ground material under the road surface .

According to scientists, the available coffee waste Melbourne would more than enough to build 5 km of roads per year.

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