Effect of Nanostructured TiO2 on Rheological Properties of Fresh Cement Slurry
Effect of Nanostructured TiO2 on Rheological Properties of Fresh Cement Slurry
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纳米结构 TiO2 对新拌水泥浆流变性能的影响
DOI：
10.1166/jnn.2020.18492
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发表时间：
2020
影响因子：
--
通讯作者：
Zeng Ling
中科院分区：
文献类型：
--
作者：
Shi Zhenning;Qi Shuangxing;Zeng Ling
新拌水泥浆施工硬化后的流变性能对水泥浆的力学性能和耐久性有很大影响。为此，开展了一系列实验，研究了不同纳米TiO 2（NT）含量对纳米TiO 2-水泥（NTC）复合浆体流变性能的影响。利用扫描电子显微镜（SEM）、能谱仪（EDS）和X射线衍射仪（XRD）对NTC的微观结构进行了分析。结果表明，切应力随NT含量的增加而增加。粘度随时间的变化分为初始下降期、初始稳定期、增长期和最终稳定期。在前两个阶段，粘度随着NT含量的增加先降低后升高。此外，粘度在后两个时期表现出相反的变化。此外，还指出水泥浆中NT含量的合理范围为0%~ 1.5%。
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%.