THE cluster of beige corrugated-iron sheds and silos don’t look like much, but this unassuming factory in a suburb of Melbourne, Australia, represents a potential revolution in greenhouse gas emissions. It’s the first commercial enterprise in the world dedicated to transforming waste from power stations and blast furnaces into geopolymer concrete, a particularly promising green concrete.
The factory, owned by the company Zeobond, is due to start operations in February. Unlike with regular concrete the chemical reactions that form this polymer-based alternative don’t give off carbon dioxide or require high temperatures, which also lead to CO2 emissions. So…
