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Effect of Nanostructured TiO₂ on Rheological Properties of Fresh Cement Slurry.

Rheological properties have a great influence on mechanical behavior and durability of fresh cement slurry after construction and hardening. For this reason, a series of experiments were carried out in this study to investigate the effects of different nanostructured TiO₂ (NT) contents on rheological properties of nanostructured TiO₂-cement (NTC) composite slurries. Moreover, the microstructure of NTC was analyzed by means of scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and X-ray diffraction (XRD). Results showed that the shear stress was increased followed by increased NT content. Variation of viscosity with time was divided into initial decline period, initial stable period, growth period and final stable period. During the first two periods, the viscosity decreased first and then increased with increased NT content. Moreover, the viscosity showed a reverse variation during the latter two periods. In addition, it was also noted that the reasonable range for NT content of cement slurry was 0%-1.5%.