Washington State University researchers have developed a carbon-negative, eco-friendly concrete formula that is almost as strong as traditional concrete. In a proof-of-concept work, the researchers at Washington State University infused standard cement with biochar, a type of charcoal produced fr
Washington State University researchers developed a carbon-negative concrete formula by infusing cement with biochar, reducing the industry’s carbon emissions. This environmentally friendly concrete reaches strength comparable to regular cement while absorbing up to 23% of its weight in CO2 from the air.researchers have developed a carbon-negative, eco-friendly concrete formula that is almost as strong as traditional concrete.
The research could significantly reduce carbon emissions of the concrete industry, which is one of the most energy- and carbon-intensive of all manufacturing industries. The work, led by doctoral student Zhipeng Li, is reported in the journal,“We’re very excited that this will contribute to the mission of zero-carbon built environment,” said Xianming Shi, professor in the WSU Department of Civil and Environmental Engineering and the corresponding author on the paper.
“We’re committed to finding novel ways to divert waste streams to beneficial uses in concrete; once we identify those waste streams, the next step is to see how we can wave the magic wand of chemistry and turn them into a resource,” said Shi. “The trick is really in the interfacial engineering – how you engineer the interfaces in the concrete.”
“Most other researchers were only able to add up to 3% biochar to replace cement, but we’re demonstrating the use of much higher dosages of biochar because we’ve figured out how to engineer the surface of the biochar,” he said.
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