中文摘要：

研究了纳米SiO2对可水合氧化铝水化行为的影响以及纳米SiO2与可水合氧化铝混合料浆的流变性。利用XRD和SEM,研究了水化产物的物相组成和形貌特征,并利用Zeta电位仪与流变仪,测试了纳米SiO2-可水合氧化铝料浆的表面电位与流变行为。结果表明：纳米SiO2的添加减缓了可水合氧化铝的水化速度,其原因是纳米SiO2在可水合氧化铝颗粒表面形成包覆层阻碍了其与水的直接接触,从而降低了可水合氧化铝的水化速率;在碱性条件下,纳米SiO2的添加使可水合氧化铝料浆具有良好的分散性,降低了料浆的触变性,使料浆呈现剪切变稀行为。

英文摘要：

The effect of nanosilica on hydration behavior of hydratable alumina and the rheological properties between nanosilica and hydratable alumina slurry were investigated. Phase compositions and microstructures of hydration products were characterized by X-ray diffraction and scanning electron microscopy. The surface electrical potential of nanosilica-hydratable alumina and rheological properties of slurry were analyzed via the Zeta potentiometer and rheometer at the same time. The results show that the addition of nanosilica could slow down the hydration rate of hydratable alumina by the formation of coating layer in the surface of it and this coating layer could block the contact between hydratable alumina and water. In alkaline conditions,the hydratable alumina particles presented shear-thinning behavior with better dispersity and lower thixotropy by the addition of nanosilica.