We could be producing concrete that's 30 percent stronger by processing and adding charred coffee grounds to the mix, researchers in Australia have discovered.
Roychand and colleagues also tried pyrolyzing the coffee grounds at 500°C but the resulting biochar particles were not as strong.
The researchers caution that they still need to assess the long term durability of their cement product. They're now working on testing how the hybrid coffee-cement performs under freeze/thaw cycles, water absorption, abrasions and many more stressors. The team is also working on creating biochars from other organic waste sources, including wood, food waste and agricultural waste.
"Our research is in the early stages, but these exciting findings offer an innovative way to greatly reduce the amount of organic waste that goes to landfill,""Inspiration for my research, from an Indigenous perspective, involves Caring for Country, ensuring there's a sustainable life cycle for all materials and avoiding things going into landfill to minimize the impact on the environment.
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