Figure 13: Showing a starting 2-D SEM image of the clinker brick (left), and a thresholded binary image showing pore regions in black(right). Each image is about 500 µm wide.
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A simplified version of the approach outlined by Quiblier has been developed, which modifies the generated 3-D structure based on analysis of the hydraulic radius of the pore space [93,94]. Transport properties such as permeability and conductivity, and the critical pore diameter can be computed to evaluate the merit of the generated 3-D microstructure. An example is shown in Fig. 13, which show the original scanning electron micrograph of a porous clinker brink, along with a thresholded and two-phase view of solid plus pores [94].
Figure 13: Showing a starting 2-D SEM image of the clinker brick (left), and a thresholded binary image showing pore regions in black(right). Each image is about 500 µm wide.
In the modified generation prcedure, S2 is calculated using the righthand side of Fig. 13 and then used to generate a 3-D microstructure. The value of sp for this structure is not equal to the original value. The hydraulic radius of the 3-D structure is then modified so as to force its value of sp to match that of the real image [93], which also makes the 2-point correlation function approximately match the real one as well. A 3-D view of the final generated brick microstructure is shown in Fig. 14, with the pores in black. As pointed out earlier in Section 2.3, while the pores appear discontinuous in the 2-D image, they are actually connected in the generated 3-D image.
Figure 14: Showing a cutaway view of a 3-D reconstructed image of the clinker brick with the same porosity (black) as the original 2-D image.