Strategies to accelerate CO2 sequestration of cement-based materials and their application prospects

In the past twenty years, significant researches have been conducted on the accelerating fixation technologies of carbon dioxide through the carbonation reaction of cement-based materials. In this study, the published literature on the application of carbonation of cement-based materials for carbon dioxide sequestration has been reviewed, the carbon dioxide sequestration capacity, the carbonation effect on the physical and mechanical behavior of recycled aggregates and concrete, the efficiency improvement methods, and the acceleration methods on the mechanical behavior of cement-based materials are discussed and summarized in detail. The comparative discussion results show that carbonation could effectively improve the mechanical performance of recycled aggregates and concrete. The parameters of liquid water content, sample size, environmental pressure, carbon dioxide concentration, and temperature significantly affect the sequestration efficiency of carbon dioxide of cement-based materials. Besides, the future application proposals of fast carbon dioxide sequestration technologies in the industrial areas and cement-based material recycling have been put forward. This review could facilitate the investigation and application of fast carbon dioxide sequestration technologies through the carbonation of cement-based materials.