A team from Western Sydney University has developed a new process that injects carbon dioxide into recycled aggregate to improve its bonding, and thus performance of recycled concrete. This benefits the environment in two ways:

  • Using carbon dioxide which would otherwise be released into the atmosphere, worsening global warming and climate change issues; and

  • Reducing landfill space by turning construction waste into construction material, i.e. recycled concrete whose performance is similar to virgin concrete.


This process can bring direct benefits to concrete batching plants as recycled concrete can be effectively used. Many leading concrete suppliers have researched this capability but none have been successful.

Associate Professor Khoa N. Le

The co-inventor of CO2 Concrete.

Khoa received his Ph.D. in October 2002 on wireless communication from the Department of Electrical and Computer System Engineering, Monash University, Melbourne, Australia. His research interests are in wireless communications with applications to structural problems, image processing and wavelet theory.

Khoa is currently working as a Associate Professor at School of Computing, Engineering and Mathematics, Western Sydney University, Australia, and Honorary Professor at Posts and Telecommunications Institute of Technology, Ho Chi Minh City, Vietnam.


Vivian W.Y. Tam

The co-inventor of CO2 Concrete.

Vivian received her Ph.D. on recycled concrete from the Department of Building and Construction at City University of Hong Kong in 2005. Her research interests are in the areas of sustainable construction, focusing on recycled concrete, environmental management in construction, green buildings and life-cycle assessment.

Vivian is currently working as the Associate Dean (International) at School of Computing, Engineering and Mathematics, Western Sydney University, Australia and Honorary Professor at College of Civil Engineering, Shenzhen University, China.


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