为经济、有效地使用减水剂，采用饱和点、扩散度及扩散度的经时损失评价减水剂与水泥相容性的方法，研究了减水剂与水泥的相容性。通过2种减水剂与4种水泥之间的相容性试验表明，饱和点、扩散度及扩散度的经时损失可以方便准确地评价减水剂与水泥的相容性。

In order to use the super-plasticizer and cement effectively, a method is proposed to evaluate their compatibility by saturation points, diffusivity and time loss of diffusivity. Compatibility tests related to two kinds of super-plasticizers and four kinds of cements were conducted. And results show that those coefficients can precisely and conveniently assess the compatibility of cement and super-plasticizer