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Menu Selection 16 can be used to evaluate the percolation properties of a phase(s) in a hydrated/leached microstructure. To use this selection, the user supplies the filename of the microstructure to be evaluated and selects the phase(s) to be evaluated from a pull-down menu. In version 1.0 of the VCCTL, the percolation properties of the following phases can be evaluated: water-filled porosity, total porosity, CH, C-S-H, pozzolanic C-S-H, total C-S-H, ettringite, or stratlingite. An example of the results for a percolation evaluation of the water-filled porosity in an initial microstructure (cem133wc030n1f.img) is provided in the Table shown in Figure 19. For each of the three principal directions (x, y, and z), the VCCTL returns the total number of pixels of the phase of interest, the fraction of these pixels which are part of percolated (through) pathways through the microstructure, and the fraction of the total pixels which are accessible from one face of the microstructure. For the example shown in Figure 19, since no hydration has yet occurred, the initial water-filled porosity between cement particles is highly percolated, with nearly all of the water-filled porosity pixels being part of a percolated pathway.
Figure 19: Results for percolation of capillary porosity in microstructure cem133wc030n1f.img.