Development of Low-carbon and Sustainable Magnesium-bearing Cementitious Materials-based Solidification Approaches for Management of Problematic Soils

The production of traditional cementitious binders such as calcium-based Portland cement poses a serious challenge to the environment and society. Therefore, low-carbon, green and sustainable magnesium-based cementitious materials are developed to replace fully or partly Portland cement and reduce the consumption of natural resources and CO2 emissions. Three interesting techniques, including reactive MgO-activated industrial solid wastes, MgObased cement and carbonation of magnesium-bearing materials, are elucidated to point to the necessity for developing novel magnesium-based cementitious materials. In the coming future, the carbonation of magnesium-rich industrial solid wastes or its combination with reactive MgO for application in various construction sectors such as soft ground improvement and concrete fabrication would be a promising approach to generate high-value products based on industrial solid wastes.