## 3 Result Analysis  
### Freeze-Thaw Cycle Test  
After the maintenance of the mixture specimens with different geopolymer contents was completed, the number of cycles was set to 0, 5, 10 and 20. After cycles, the UCS, CRM and ITS of the specimens without geopolymer, 20% geopolymer content, 40% geopolymer content and different freezing and thawing cycles were tested. The results are shown in Table 11. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline \multirow{2}{*}{**Sample**} & \multirow{2}{*}{\
\begin{tabular}{c} **Freeze–Thaw** \\ **(Number of** \\ **Cycles)** \\ \end{tabular} } & \multirow{2}{*}{
\begin{tabular}{c} **Geopolymer** \\ **Content (\%)** \\ \end{tabular} } & \multirow{2}{*}{**UCS (MPa)**} & \multirow{2}{*}{**CRM (MPa)**} & \multirow{2}{*}{**ITS (MPa)**} \\ \hline
1 & & 0 & 7.58 & 2938.144 & 0.80 \\
2 & 0 & 20 & 7.69 & 2869.231 & 0.84 \\
3 & & 40 & 7.54 & 2634.328 & 0.77 \\
4 & & 0 & 6.81 & 2831.915 & 0.71 \\
5 & 5 & 20 & 6.96 & 2797.727 & 0.75 \\
6 & & 40 & 6.52 & 2529.328 & 0.68 \\
7 & & 0 & 5.48 & 2678.261 & 0.59 \\
8 & 10 & 20 & 5.57 & 2585.415 & 0.64 \\
9 & & 40 & 5.18 & 2372.354 & 0.56 \\
10 & & 0 & 4.64 & 2595.741 & 0.48 \\
11 & 20 & 20 & 4.89 & 2491.658 & 0.53 \\
12 & & 40 & 4.45 & 2297.482 & 0.45 \\ \hline \hline \end{tabular}
\end{table} 
Table 11: Results of freezing and thawing cycle test. Figure 3: Sample preparation process: (**a**) geopolymer preparation, (**b**) mixed specimen preparation. It is possible to note from Figure 4 that the UCS of the undoped geopolymer mixture, 20% geopolymer mixture and 40% geopolymer mixture is 7.58 MPa, 7.69 MPa and 7.54 MPa, respectively. The UCS of the 20% geopolymer mixture is the highest, which is 1.5% and 2.0% higher than that of the undoped geopolymer mixture and 40% geopolymer mixture. The UCS of the mixture with three kinds of geopolymer contents decreased after freezing and thawing cycles. Of these, the loss of UCS after 10 cycles was the most obvious, and the UCS loss of the mixture was 27.70%, 27.57% and 31.30%, respectively. Between approximately 10 and 20 cycles, the damage of UCS was relatively small. After 20 cycles, the residual UCS of the mixture with a 20% geopolymer dosage reached up to 4.89 MPa in three dosages. It can be seen that the mixture with a 20% geopolymer content is superior to the mixture with 0% geopolymer content and 40% geopolymer content, both in terms of strength and the rate of loss of strength. When 20% geopolymer was added, the CRM decreased by 2.35% compared with the mixture without a geopolymer. When the dosage of the geopolymer increased to 40%, the CRM of the mixture decreased by 10.34%. This obvious decrease shows that the mixture with a 40% geopolymer content is quite significant in reducing CRM. After freezing and thawing cycle tests, the CRM of the mixture with different geopolymer contents showed different degrees of reduction. This reduction is negatively correlated with the number of cycles; that is, the higher the number of cycles, the smaller the CRM of the mixture with three kinds of geopolymer content decreased by 11.65%, 13.16% and 12.79%, respectively. This reduction means that the deformation resistance of the mixture is weakened. In addition, according to Figure 4(b), the loss of strength of the mix with three types of geopolymer dosage is significant after 10 freeze-thaw cycles, which is 8.85%, 9.89% and 9.94%, respectively. After that, with an increase in cycles, the CRM loss tends to be gentle. It is clear from Figure 6 that the ITS of the undoped geopolymer mixture, 20% geopolymer mixture and 40% geopolymer mixture is 0.80 MPa, 0.84 MPa and 0.77 MPa, respectively. The ITS of the 20% geopolymer mixture is the highest, which is 5% and 9.09% higher than that of the undoped geopolymer mixture and 40% geopolymer mixture. With an increase in cycles, the ITS of the mixture gradually reduced. The ITS of the mixture decreased most significantly after 10 freeze-thaw cycles, which were 26.25%, 23.81% and 27.27%, respectively.