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Swapping slag for sludge leads to emissions-cutting tough concrete | Using more sludge and less slag in their recipe, researchers were able to create a material that's stronger than even today's enhanced cements and highly resistant to corrosion by acid.
Using more sludge and less slag in their recipe, researchers were able to create a material that's stronger than even today's enhanced cements and highly resistant to corrosion by acid. It could solve a serious problem facing sewer pipes worldwide.
“Sludge is usually disposed of in landfill sites, which not only reduces available land for other uses, but also harms the environment, creating CO2 emissions from transporting the waste,” said study co-author and UniSA civil engineering PhD candidate, Weiwei Duan. Considering that some estimates say that there are enough sewer pipes in use globally to circle the equator multiple times, if the new material finds its way into sewage systems in the coming years, it could have a dramatic impact on pollution. “This has the potential to extend the service life of sewage pipes, reduce maintenance costs, and promote the reuse of water treatment byproducts, thus contributing to the circular economy," concludes AniSA professor Yan Zhuge, who was the principle supervisor and lead researcher on the project.
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