摘   要：以水为分散介质，通过高速机械剪切工艺对原状加密硅灰进行分散处理，并在分散过程中添加分散剂、稳定剂及消泡剂，成功制备出了具有良好稳定性和均质性的硅灰浆液。在此基础上，通过梯度降低水泥和胶凝材料总量，研究了硅灰浆液对C30、C60混凝土工作性、力学性能的影响。结果表明：在特定胶凝材料用量区间内，基于适量硅灰浆液配制的混凝土工作性良好，其28 d抗压强度满足C30、C60设计强度等级要求；对于C30、C60混凝土，掺入适量硅灰浆液可使水泥用量分别降低18.41%~26.54%、11.73%~16.66%。

Abstract: Taking water as the dispersing medium, high-speed mechanical shearing was used to disperse the original densified silica fume, and the dispersants, stabilizers, and defoamers were added during the dispersion process to successfully prepare the silica fume slurry with good stability and homogeneity. Based on this, the effects of silica fume slurry on the workability and mechanical properties of C30 and C60 concrete were studied by gradually reducing the amounts of cement and cementitious materials. The results show that, within a specific range of cementitious material amounts, concrete prepared with an appropriate amount of silica fume slurry exhibits good workability, and its 28 d compressive strength meets the requirements of C30 and C60 design strength grade. For C30 and C60 concrete, the addition of an appropriate amount of silica fume slurry can reduce the cement amount by 18.41%~26.54% and 11.73%~16.66%, respectively.