Calcium sulfoaluminate belite (CSAB) cement has gained prominence as a viable environmentally friendly substitute for conventional Portland cement (PC). The amount of carbon dioxide emitted during the manufacturing of calcium sulfoaluminate belite cement is about 30% less than that of portland cement. The major clinker phase of CSAB cement is ye'elimite which hydrates in the presence of calcium sulfates to form ettringite along with the amorphous form of aluminium hydroxide. CSAB cement can be made expansive by adjusting the amount of calcium sulfate in the system. Similar to CSAB cement, adding calcium sulfoaluminate-based admixture to PC can induce shrinkage-compensating characteristics. Numerous studies have investigated the hydration and expansive characteristics of the CSAB system. However, the literature on durability CSAB cement concrete against CO2 and chloride ingress is limited and contradictory. The first part of the work focuses on the carbonation resistance of CSAB system. The binder systems under consideration were exposed to both accelerated (3% CO2) and natural carbonation environments to understand their resistance against carbonation. Furthermore, the hydrated phase assemblage and pore structure changes were studied through detailed characterisation of control and exposed samples. The resistance against carbonation in CSAB cement system was observed to be lower than PC system. By addition of calcium hydroxide, the carbonation resistance of CSAB system could be enhanced. The second part of the work looked at the resistance of CSAB systems against the transport of chloride ions. Both accelerated migration-based tests (RCPT and RCMT) and long-term bulk diffusion tests were conducted. The results indicate that the long-term bulk diffusion-based test and accelerated migration-based test results don’t have a strong correlation. Additionally, the CSAB system had lower pore solution conductivity than PC, affecting the migration of ions in the system. Moreover, the binding capability of the CSAB systems was assessed based on the total and free chloride present in the system. The CSAB system is observed to have lower binding capability than PC, limiting the system's capability to prevent ingress of chloride ions. Further, blending CSA admixture with PC enhanced the resistance against chloride transport.