The Hong Kong Polytechnic University (PolyU) is making significant strides in sustainable construction under the guidance of Prof. LI Xiangdong, Director of RICRI. Prof. LI leads a multidisciplinary team that has secured HK$6.03 million from the HKSAR Government’s Green Tech Fund to develop a pioneering low-carbon, self-healing concrete for marine use.
This project addresses the urgent need for sustainable alternatives to natural aggregates, which are increasingly scarce. By integrating recycled aggregates enhanced through biomineralisation, the team utilises marine bacteria to capture carbon dioxide and accelerate the carbonisation process. This not only improves the durability and self-healing properties of the concrete but also reduces carbon emissions and promotes the recycling of construction waste.
The innovative material is designed to withstand harsh marine environments, making it ideal for coastal engineering and marine infrastructure. The research will include field trials and lifecycle assessments to ensure the concrete meets high standards for durability and environmental protection. Expected outcomes include practical guidelines for design and mixing, as well as insights into the ecological impact of this new material.
Prof. LI emphasises that this initiative will help reduce landfill pressures, conserve land resources, and contribute to carbon neutrality, supporting the long-term sustainable development of Hong Kong and the Greater Bay Area.
