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After studying the tensile stress and the impact of the water content, the effect of the water content of the red mud on the red mud cracks was studied by studying the tensile stress test of the red mud, and the effects of the different red mud water content on the red mud cracks were analyzed. The study on the tensile stress of the red mud was carried out, and the calculation formula was also given. The tensile stress of the red mud was compared, and the water absorption analysis was carried out. In addition, the effect of the water content on the red mud cracks was analyzed by the numerical simulation of the red mud cracks.

Red Cad Crack

The fitting curves of the 10 samples are plotted in Figure 16. It can be seen that the first characteristic value of the 10 samples varies greatly, but the second characteristic value is basically the same, which is the main reason for the different development trends of the cracks. It can also be seen from Figure 16 that the water absorption also acts as the control parameter of the crack development. After the water absorption increases to the critical value, the crack degree of the 10 samples increases rapidly.

In the early stage of expansive rock/soil being immersed in water, the water absorption of the rock is not large, there is no obvious crack emergence, and the overall crack development is stable. Only as the expansive rock/soil continues to be immersed in water, the water absorption will increase and the multi-crack phenomenon will occur. The process of the crack development is very obvious, and the micro-crack is obvious. The water absorption increases rapidly with the duration of immersion, the development of the crack network is rapid, and there are a lot of small cracks. The crack will rapidly expand, and the development of new crack and the fusion of existing crack are different. A lot of small cracks on the surface of expansive soil are formed. The crack rapidly develops under the condition of water absorption larger than the critical water absorption value and long-term immersion, the water absorption increases to the second characteristic value, and the crack gradually grows. The cracks gradually extend and fuse, and the development of cracks is completed. At this time, some long cracks are formed on the surface of expansive soil. The crack gradually extends and fuses under the condition of large water absorption, and finally, the self-healing effect is achieved. Water absorption larger than the third characteristic water absorption value is achieved, the development of the crack network will increase gradually, and the development trend is basically stable.