Making stronger concrete with 'sewage-enhanced' steel slag https://t.co/TcuwULAqUT— Chemistry News (@ChemistryNews) April 6, 2020
The global steel-making industry produces more than 130 million tonnes of steel slag every year. This waste material is already being used to replace aggregates in concrete, but by using it to treat wastewater first, researchers have found it can then be recycled to make concrete stronger, "in a zero-waste approach to help advance the circular economy":
Engineering researchers at RMIT University, in Melbourne, Australia, examined whether slag that had been used to treat wastewater could then be recycled as an aggregate material for concrete.
The concrete made with post-treatment steel slag was about 17% stronger than concrete made with conventional aggregates, and 8% stronger than raw steel slag.
