This paper studied the influence of basalt manufactured sand on the compatibility and workability between different types of cement fly ash cementitious systems and different types of water reducing agents.Based on the optimal mix proportion,high-performance concrete with C25 and C30 strength grades of basalt manufactured sand was prepared,and its workability,mechanical properties and durability were systematically studied.The results indicated that the compatibility between different water reducing agents and different cements was different,and the content of basalt manufactured sand and its stone powder had a significant impact on the workability of cement slurry.The addition of basalt powder within 5％or increasing the amount of water reducing agent at the same time could effectively improve the fluidity of the slurry,while the manufactured sand produced by dry sieving method had the best effect on improving the fluidity of the mortar.The 14-day expansion rate results indicated that basalt manufactured sand had certain potential alkaline activity,and further experimental research should be conducted in use.
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