A systematic review on durability of calcium sulphoaluminate cement-based materials in chloride environment

Calcium sulphoaluminate (CSA) cement is an environmentally friendly material and has its specific characteristics, including good resistance to ingress of external chlorides. To date, performance evolution and relevant mechanism of CSA cement-based materials during its service in chloride environment are still not clear, and needs a thorough study before its widely application in practice. This paper reviews the research progress on the chloride transport, chloride binding and corrosion behavior of steel in CSA cement under chloride environment. The crucial factors influencing the resistance of CSA cement-based materials to chloride attack are emphasized, such as water-to-binder ratio, molar ratio of gypsum to ye'elimite and use of supplementary cementitious materials. Meanwhile, future research directions on chloride related durability issues of CSA are recommended.