in the world
Concrete, which is made using industrial waste from steel manufacturing and coal-fired power stations, is being used in a trial in the roads of Sydney for the first time in the world.
UNSW Sydney researchers and the CRCLCL, CRC for Low Carbon Living will use these trial results to create industry guidelines for the very first set of geopolymer concrete.
“While we’ll monitor the road performance for up to five years, a lot of the data collected in the first three to 12 months of this world-first trial will be used to confirm our models and strengthen our predictions. Concrete contributes 7% of all greenhouse gas emissions and in 2018 the world produced about 4.1 billion tonnes of cement, which contributed about 3.5 billion tonnes of CO2. Alternative, low-CO2 concrete materials offer potential benefits in reducing the greenhouse gas emissions associated with conventional concrete. This trial is important because we need demonstration projects to accurately assess the performance of geopolymer over time so that there can be broader uptake,” said Craig Heidrich, executive director of Australian (Iron and Steel) Association and Ash Development Association.
According to the associate professor of sustainability research at UNSW, Dr Tommy Wiedmann, if all concrete produced was geopolymer in place of traditional concrete for one year- 12,000 kilotons of carbon di oxide would be saved.