3.4.2 XCT text
The XCT test is performed on the samples of group O, group C2 and group C2S1. The XCT image data processing and results are shown in Figure 11. Figs.11a, 11b, and 11c are the XCT three-dimensional structure diagrams of the group O, the group C2 and the group C2S1, respectively, and the pore structure of the sample is clearly visible. Figs.11d-11f are the corresponding cross-section images, and the pore colors in the images are green, black and tan, respectively. Figure 11g-11i is the pore size distribution of the sample based on XCT.
From the figures 11a-11c, it can be seen that the porosity of the three groups is different, which is 42.62 %, 48.53 % and 33.22 % respectively. Therefore, the incorporation of carbon fiber increases the porosity of foam concrete, while the porosity of group C2S1 mixed with carbon fiber and graphite is the lowest. The pore size distribution of the three groups shown in figure 11g-11i is similar to that of the SEM pore size distribution in section 3.4.1, and the average pore sizes are 271 μm, 263 μm and 291 μm, respectively. The difference between the average pore sizes obtained by the two methods is 11 μm, 6 μm and 1.19 μm, respectively. Indicating that the pore size distribution obtained by the two methods is similar.