A new type of MPC-FAC composite cement was created by mixing a specific proportion of fer-roaluminate cement(FAC)into magnesium phosphate cement(MPC)in an attempt to increase the water and sulfate erosion resistance of MPC and lower the cost of construction.The mass loss and compressive and flexural strength of MPC-FAC mortar specimens after standard curing for 28 days were tested and immersed in water and 5％Na2SO4 solution at different ages,respectively,and compared with MPC mortar specimens under the same environment.The micromorphology and chemical composition of MPC and MPC-FAC after long-term immersion were analyzed by SEM-EDS.The results demonstrated that the MPC-FAC mortar with 38％FAC had the lowest mass loss rate,the highest compressive and flexural strengths,and the strongest resistance to water and sulfate erosion.The addition of an appropriate quantity of FAC enhanced MPC-FAC mortar's densification,which can significantly increase its resistance to water and sulfate erosion.
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