Every year, 10 billion kilograms of coffee waste is produced worldwide, most of which ends up in landfills. However, this could change after a surprising discovery by a group of Australian researchers.

The scientists have discovered that coffee grounds can be used to produce concrete that is 30 % stronger. All that needs to be done is to add carbonised coffee grounds to the concrete mix.

“Disposing of organic waste poses an environmental challenge as it emits large amounts of greenhouse gases, including methane and carbon dioxide, which contribute to climate change,” explains Rajeev Roychand, an engineer at the Royal Melbourne Institute of Technology (RMIT).

At a time when the construction market is booming around the world, the demand for concrete is also increasing, which is resource-intensive and poses another set of environmental challenges.

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