The effects of ultrasonic treatment on the cement grouting mechanism are important in water leak prevention, fractured rock reinforcement, and ground stabilisation. However, its effects on the flow of cement particles through different lengths of porous media remain poorly understood. In this study, ultrasonic effects on cement particles were investigated by measuring the median particle size of cement slurry under 0, 600, 1200, and 1800 W of applied ultrasound to examine the influence of ultrasonic stimulation on the cement hydration reaction. Transport experiments were performed with the same ultrasound conditions and column lengths of 23, 33, and 43 cm to establish the roles of ultrasonic stimulation and migration distance in cement particle concentration. The laboratory results suggest that as the ultrasonic power increases, the sizes of the corresponding cement particles decrease. Cavitation due to ultrasonic stimulation accelerates the hydration reaction in the cement slurry, decreasing the median particle size. Furthermore, during the transport experiments, the cement particle concentration in the effluent decreases with increasing migration distance. Additionally, as the ultrasonic power increases, the adhesive force between the cement particles and porous walls of the sand column increase, causing the concentration of cement particles in the sand column effluent to decrease. [ABSTRACT FROM AUTHOR]