cement retarder meaning in English

水泥缓凝剂

Gypsum for portland cement retarder
硅酸盐水泥缓凝剂用石膏
The paper studies on the principal technologies on coal desulfurization and retardant mechanism of cement retarder and active mechanism of cement mixed material
摘要介绍了煤炭脱硫产物和它们作水泥缓凝剂、水泥混合材的研究。
As a kind of cement retarder , normal setting time and good effect for mechanical properties and soundness of cement can be got when adding desulfurization gypsum in cement , so it can used instead of natural gypsum to produce cement entirely , coal gangue is activated and coal ash desulfurized have good active , can improve cement output and also can depress consumption when them be used as mixed material , have well economic and environmental effects
脱硫石膏作水泥缓凝剂时，水泥的安定性、凝结时间正常，可改善水泥的力学性能，完全可替代天然石膏；活化后的煤矸石和脱硫煤灰具有较好的活性，用作水泥混合材可增加水泥产量、降低生产成本，具有良好的经济和环境效益。