## Appendix A  
_Statistical ANOVA Analysis_  
This appendix presents the tables corresponding to the results of the statistical analysis of variance (ANOVA), applied to the unconfined compressive strength (\(qu\)) and small-strain stiffness (\(Go\)) obtained from the various compacted blends or geomaterials studied. This analysis allowed for the identification of statistically significant effects of the main factors--such as cement content, the addition of residues (CLW, GY, and GG), xanthan gum (XG), and the XG-PPF combination--as well as their second-order interactions on the mechanical properties evaluated. The tables detail the main effects and interactions, including the associated significance levels for each source of variation. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Source**} & **Sum of Squares** & **Degrees of Freedom** & **Mean Squares** & **Z** & \multirow{2}{*}{_p-Value_} & **Significance (_p-Value \textless{} 0.05_)** \\ \hline Corrected Model & 12341565.028 * & 9 & 1371285.003 & 228.894 & \textless{}0.001 & yes \\ Cement & 9013004.694 & 1 & 9013004.694 & 1504.446 & \textless{}0.001 & yes \\ GG & 194040.250 & 1 & 194040.250 & 32.389 & \textless{}0.001 & yes \\ \(\gamma\)d & 2554313.167 & 2 & 1277156.583 & 213.182 & \textless{}0.001 & yes \\ GG * Cement & 15088.028 & 1 & 15088.028 & 2.518 & 0.125 & no \\ Cement * \(\gamma\)d & 560159.389 & 2 & 280079.694 & 46.751 & \textless{}0.001 & yes \\ GG * \(\gamma\)d & 4959.500 & 2 & 2479.750 & 0.414 & 0.665 & no \\ Error & 155763.722 & 26 & 5990.912 & & & \\ Total & 126762739.000 & 36 & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 10: ANOVA Table for the _qu_ Results: Cement—CLW Blends. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Source**} & **Sum of Squares** & **Degrees of Freedom** & **Mean Squares** & **Z** & \multirow{2}{*}{_p-Value_} & **Significance (_p-Value \textless{} 0.05_)** \\ \hline Corrected Model & 8260101.000 * & 9 & 917789.000 & 198.823 & \textless{}0.001 & yes \\ Cement & 6266677.778 & 1 & 6266677.778 & 1357.566 & \textless{}0.001 & yes \\ CLW & 59049.000 & 1 & 59049.000 & 12.792 & 0.001 & yes \\ \(\gamma\)d & 1647094.22 & 2 & 825347.111 & 178.407 & \textless{}0.001 & yes \\ CLW * Cement & 4715.111 & 1 & 4715.111 & 1.021 & 0.321 & no \\ Cement * \(\gamma\)d & 263902.889 & 2 & 131951.444 & 28.585 & \textless{}0.001 & yes \\ CLW * \(\gamma\)d & 18662.000 & 2 & 9331.000 & 2.021 & 0.153 & no \\ Error & 120018.889 & 26 & 4616.111 & & & \\ Total & 36262040.000 & 36 & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 2: ANOVA Table for the _qu_ Results: Cement—GY Blends. \begin{table}
\begin{tabular}{c c c c c c c} \hline \hline \multirow{2}{*}{**Source**} & **Sum of Squares** & **Degrees of Freedom** & **Mean Squares** & **Z** & \multirow{2}{*}{_p-Value_} & **Significance (_p-Value \textless{} 0.05_)** \\ \hline Corrected Model & 12341565.028 * & 9 & 1371285.003 & 228.894 & \textless{}0.001 & yes \\ Cement & 9013004.694 & 1 & 9013004.694 & 1504.446 & \textless{}0.001 & yes \\ GG & 194040.250 & 1 & 194040.250 & 32.389 & \textless{}0.001 & yes \\ \(\gamma\)d & 2554313.167 & 2 & 1277156.583 & 213.182 & \textless{}0.001 & yes \\ GG * Cement & 15088.028 & 1 & 15088.028 & 2.518 & 0.125 & no \\ Cement * \(\gamma\)d & 560159.389 & 2 & 280079.694 & 46.751 & \textless{}0.001 & yes \\ GG * \(\gamma\)d & 4959.500 & 2 & 2479.750 & 0.414 & 0.665 & no \\ Error & 155763.722 & 26 & 5990.912 & & & \\ Total & 126762739.000 & 36 & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 3: ANOVA Table for the _qu_ Results: Cement—GG Blends.