## 4 Evaluation Results  
### Property Change to the Four Types of Grout-Injection Materials after Degradation Effects  
The following tables present the technical evaluation results of the four respective grout-injection materials assessed in compliance to the respective evaluation methods outlined in the six test methods. Refer to the below Tables 6-8 for details. Figure 12: The substrate behavior resistance test method: (**a**) the substrate behavioral movement cycling procedure and (**b**) the permeability testing (hydrostatic pressure testing). \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \multicolumn{2}{c}{**Specimens**} & \multicolumn{1}{c}{\begin{tabular}{c} **Thermal** \\ **Stress** \\ **(Leakage** \\ **Time, min**) \\ \end{tabular} } & \begin{tabular}{c} **Chemical** \\ **Erosion** \\ **(Mass** \\ **Loss, \%)** \\ \end{tabular} & \begin{tabular}{c} **Water** \\ **Flow** \\ **Flow** \\ **Erosion** \\ **(Mass** \\ **Loss, \%)** \\ \end{tabular} & \begin{tabular}{c} **Wet Surface** \\ **Adhesion** \\ **Strength** \\ **(De-Bonding** \\ **Time, s)** \\ \end{tabular} & \begin{tabular}{c} **Hydrostatic** \\ **Pressure** \\ **Time, min** \\ \end{tabular} \\ \hline \multirow{4}{*}{\begin{tabular}{c} Acrylic \\ A \\ \end{tabular} } & 1 & 30 & 8.9 & 40.76 & 60 & 29 & 0 \\  & 2 & 25 & 9.1 & 48.43 & 60 & 22 & 0 \\  & 3 & 27 & 5.7 & 51.57 & 60 & 52 & 0 \\  & Avg & 22 & 7.9 & 46.92 & 60 & 34 & 0 \\ \hline \multirow{4}{*}{\
\begin{tabular}{c} Acrylic \\ C \\ \end{tabular} } & 1 & 34 & 6.7 & 24.19 & 54 & 60 & 0 \\  & 2 & 21 & 5.2 & 20.19 & 46 & 52 & 60 \\ \cline{1-1}  & 3 & 42 & 7.9 & 54.02 & 39 & 60 & 60 \\ \cline{1-1}  & Avg & 32 & 6.6 & 32.80 & 46 & 57 & 40 \\ \hline \multirow{4}{*}{
\begin{tabular}{c} Acrylic \\ C \\ \end{tabular} } & 1 & 60 & 5.9 & 39.76 & 45 & 60 & 60 \\  & 2 & 23 & 4.8 & 22.05 & 60 & 14 & 60 \\ \cline{1-1}  & 3 & 60 & 5.8 & 29.00 & 49 & 60 & 60 \\ \cline{1-1}  & Avg & 48 & 5.5 & 30.27 & 60 & 60 & 60 \\ \hline \hline \end{tabular}
\end{table} 
Table 6: The evaluation results of the acrylic-resin grout-injection material. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multicolumn{2}{c}{**Specimens**} & \multicolumn{1}{c}{\begin{tabular}{c} **Thermal** \\ **Stress** \\ **(Leakage** \\ **Time, min**) \\ \end{tabular} } & \begin{tabular}{c} **Chemical** \\ **Erosion** \\ **(Mass** \\ **Loss, \%)** \\ \end{tabular} & \begin{tabular}{c} **Water** \\ **Flow** \\ **Flow** \\ **Erosion** \\ **(Mass** \\ **Loss, \%)** \\ \end{tabular} & \begin{tabular}{c} **Wet Surface** \\ **Adhesion** \\ **Strength** \\ **(De-Bonding** \\ **Time, s)** \\ \end{tabular} & \begin{tabular}{c} **Hydrostatic** \\ **Pressure** \\ **Time, min** \\ \end{tabular} \\ \hline \multirow{4}{*}{\begin{tabular}{c} Prethane \\ A \\ \end{tabular} } & 1 & 12 & 15.5 & 4 & 14 & 15 & 3 \\  & 2 & 9 & 14.9 & 10 & 2 & 23 & 0 \\  & 3 & 34 & 17.0 & 15 & 6 & 14 & 1 \\  & Avg & 18.33 & 15.8 & 10 & 7.33 & 17.33 & 133 \\ \hline \multirow{4}{*}{\
\begin{tabular}{c} Prethane \\ B \\ \end{tabular} } & 1 & 5 & 16.9 & 8 & 0 & 10 & 4 \\  & 2 & 7 & 17.2 & 8 & 1 & 9 & 0 \\ \cline{1-1}  & 3 & 8 & 15.8 & 4 & 6 & 6 & 3 \\ \cline{1-1}  & Avg & 6.67 & 16.6 & 7 & 2.33 & 8.33 & 2.33 \\ \hline \multirow{4}{*}{
\begin{tabular}{c} Prethane \\ C \\ \end{tabular} } & 1 & 6 & 15.2 & 20 & 2 & 5 & 0 \\  & 2 & 14 & 16.3 & 21 & 31 & 26 & 2 \\ \cline{1-1}  & 3 & 3 & 17.0 & 23 & 13 & 43 & 14 \\ \cline{1-1}  & Avg & 7.67 & 16.2 & 21 & 15.33 & 24.67 & 5.33 \\ \hline \hline \end{tabular}
\end{table} 
Table 7: The evaluation results of the epoxy-resin grout-injection materials.