Abstract:

To enhance the erosion resistance of cement-solidified soil and facilitate its application in underwater structural protection, an investigation was conducted into the erosion resistance of cement-solidified soil through the addition of cement and a liquid curing agent to sand and clay. Erosion resistance tests were performed using the erosion function apparatus (EFA). The curing mechanisms was analyzed and the impact of curing agent and curing duration on the erosion resistance of cement-solidified soil was examined. The findings indicated that the strength of cement-solidified soil increased with longer curing times, with clay reaching its rapid strength development stage earlier than sand. Curing agent notably augmented the critical shear stress of the soil and significantly reduced erosion rates, thereby enhancing erosion resistance. Moreover, the rate of increase in critical shear stress gradually diminished with longer curing times until reaching a critical maximum value. Based on the observed variations in critical shear stress, a predictive model for the critical shear stress of cement-solidified soil was proposed. Experimental data comparisons validated the efficacy of the model in predicting critical shear stress variations with curing time.

Key words: cement-solidified soil, curing time, curing agent, curing mechanism, erosion resistance, critical shear stress