Indian scientists have created a concrete mix incorporating processed human waste that outperforms standard concrete in several key metrics. The study’s findings have been published in the journal Scientific Reports.
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The researchers used biochar derived from treated fecal sludge as an additive. This material was ground into a powder and used to replace a portion of the cement in a standard concrete mix.
The most significant results were observed with a 10% biochar content. After 91 days, this concrete demonstrated 42% higher flexural strength and 21% higher compressive strength compared to the control sample.
The researchers also experimented with replacing 5% and 15% of the cement. Their data indicated that mixtures containing between 5% and 10% biochar yielded the best results, whereas increasing the proportion beyond this range did not provide further benefits.
This innovation could simultaneously aid in waste recycling and reduce cement consumption. However, the authors emphasize that further research and real-world construction testing are required before the material can be adopted for mass use.
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