Nano C-S-H seed has been used as an early strength agent because of its significant acceleration effect on hydra-tion of cement.In this paper,the plastic viscosity,dynamic yield stress,static yield stress and thixotropy of cement paste mixed with nano C-S-H seed were measured by rheometer to study the effect of nano C-S-H seed on rheological properties of cement paste.The results show that the plastic viscosity,dynamic yield stress,static yield stress and thixotropy of cement paste increase with the addition of nano C-S-H seed.The water-cement ratio also has significant influence on rheological properties of cement paste.The lower the water-cement ratio is,the greater the plastic viscosity,dynamic yield stress,static yield stress and thixotropy of cement paste.
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