## 3 Results and Analysis
### Microstructure of Lime-Stabilized Slurry  
#### 3.3.1 MIP Test Results  
Figures 6 and 7 below show the cumulative mercury injection curve and the pore volume distribution curves of the stabilized slurry with different lime dosages, respectively. The pore distribution of the soil samples in each test group showed an obvious \"unimodal\" structure, and the pore diameters were concentrated between 0.1 \(\upmu\)m and 1 \(\upmu\)m. After lime  
Figure 5: Slurry log \(k\)-log \(p\) curves for each group with different lime dosages. (**a**) Wenzhou soil sample, (**b**) Hangzhou soil sample, (**c**) Taizhou soil sample, (**d**) Zhoushan soil sample. stabilization, both the total pore volume of the slurry and the pore diameters corresponding to the peak of the pore volume distribution curve increased. In the case of the Hangzhou stabilized slurry, both pore volume and peak pore diameter increased with the increase in lime dosage, reaching a peak with a 2% lime dosage, and both decreased when the lime dosage was further augmented. Based on earlier consolidation/permeability test results, it was established that the law of change in pore volume and pore diameter was consistent with that of the permeability coefficient of cured silt. As the seepage flowed, the pore volume was observed to directly influence the permeability of the soil samples. When the lime dosage was lower than the optimal dosage, the pore volume and pore diameter of the stabilized slurry increased, as did the permeability of the soil. When the lime dosage exceeded the optimal dosage, the pore volume and pore diameter of the stabilized slurry was found to decrease, which was also believed to explain the decrease in permeability of the Hangzhou stabilized slurry when the lime dosage was further increased in the macroscopic test. By comparing the pore volume distribution curves of each group of stabilized slurry with the same lime dosage, the pore structure of the slurry with high clay content changed more significantly than that of the silt slurry. When the lime dosage was 1%, the pore volume of the Hangzhou stabilized slurry showed the greatest tendency to increase compared to the remolded slurry, reaching 31.2%, while that of the Wenzhou, Taizhou, and Zhoushan stabilized slurry only increased by 12.3%, 11.2%, and 12.0%, respectively. In addition, the pore diameter corresponding to the peak of the pore volume distribution curve of the Hangzhou stabilized slurry reached 0.43 \(\upmu\)m, which was also greater than the pore diameters of the other three slurry types at the same point. In summary, firstly, the clay content proved to be affected by pore volume and pore diameter after lime stabilization, a finding that was consistent with the results of the macroscopic consolidation/permeability  
Figure 6: Cumulative mercury injection curve of stabilized slurry for each group with different lime dosages. (**a**) Wenzhou soil sample, (**b**) Hangzhou soil sample, (**c**) Taizhou soil sample, (**d**) Zhoushan soil sample. tests, and secondly, the best permeability was achieved by treating the Hangzhou soil samples with a 1% lime dosage. To analyze the variation pattern of pore structures of the lime-stabilized slurry, the pores were classified into four categories: (i) micropores (pore equivalent diameter \(\leq\) 0.01 \(\upmu\)m), (ii) pinholes (0.01 \(\upmu\)m \(<\) pore equivalent diameter \(\leq\) 0.1 \(\upmu\)m), (iii) mesopores (0.1 \(\upmu\)m \(<\) pore equivalent diameter \(\leq\) 1 \(\upmu\)m), and (iv) macropores (pore equivalent diameter \(>\) 1 \(\upmu\)m), as shown in Figure 8 below. The pores in the slurry of each test group mainly consisted of pinholes and mesopores, with a total combined percentage exceeding 80%. After lime stabilization, the percentages of micropores, pinholes, and macropores in the slurry of each test group were found to decrease, while the percentage of mesopores increased and reached its peak with the optimal lime dosage.