As cement retarder , the effect of desulphurize ashfuel oil ( DADFO ) was studied here.

研究了石油焦脱 硫 灰渣用作水泥缓凝剂对水泥性能的影响.

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The research on using waste gypsum from producing concrete admixture as cement retarder is presented.

介绍了利用生产混凝土外加剂时排放的工业废石膏作为水泥缓凝剂的研究.

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