Carbon dioxide sequestration on masonry blocks

This chapter describes the research progress on carbon dioxide (CO₂) absorption during the production of concrete blocks. The masonry blocks subjected to accelerated carbonation have higher CO₂ sequestration compared with that of under weathering carbonation because of the higher CO₂ concentration and accelerated carbonation. A wide variety of factors influencing the accelerated carbonation process, such as preconditioning, raw materials, water-to-cement ratio, sand-to-cement ratio and compaction pressure, concentration and pressure of CO₂, and post-curing, are discussed. Also, the kinetic model, dimensional stability, and microstructure of concrete blocks after accelerated carbonation are described.