The biochar was able to suck up to 23 percent of its weight in carbon dioxide from the air.
Washington State University (WSU) researchers have engineered a carbon-negative, environmentally friendly concrete that is nearly as strong as regular concrete by infusing regular cement with biochar, a type of charcoal made from organic waste.
The biochar was able to suck up to 23 percent of its weight in carbon dioxide from the air while still achieving a strength comparable to ordinary cement.
“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.
More than 4 billion tons of concrete are produced every year globally and cement production is thought to be responsible for about 8 percent of total carbon emissions by human activities worldwide.
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