First of all, the particle size distribution of completely weathered granite (CWG) cannot easily be compared with silt size because the particle size distribution of CWG shown in figure 6 contains more than 40 percent silt size in the most extreme case, which may not represent the actual area where the chemical grouting was performed (Bruce and Shirlaw 1985; Shirlaw 2022). Figure 6 presents the average particle size curves of 72 samples regarding CWG and these grading curves range from silt to gravel sizes, most of which are sand and gravel particles. Moreover, the silt size within...

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