## 4 Results and Discussion
### Viscoelastic Adhesion Strength
Therefore, in this experiment, this average value can be proposed as a quality standard value. Furthermore, it was confirmed that the test method proposed in this study can measure the viscoelastic adhesion strength of the NHV-SPRG composite waterproofing sheet in the field. However, as a result of confirming the increase or decrease of the peel load value for each section from P1 to P10, all four types showed different types of peel load values. Taken together, in the case of VG-1 Type, the 30-60 mm section shows a decreasing trend, but increases in the 70-110 mm section and decreases again at the 120 mm section, showing a decreasing \(\rightarrow\) increasing \(\rightarrow\) decreasing trend. In the two samples, VG-2 type was increased in the early stage and decreased in the latter half, showing an increase \(\rightarrow\) decrease trend. Conversely, the other one showed a high decrease in the early stage and a high increase in the latter part, showing a high decrease \(\rightarrow\) increase trend. VG-3 Type generally increased in the early stage and decreased in the latter half, showing an increase \(\rightarrow\) decrease trend. The VG-4 type generally decreased and increased in some sections, but the increased peel load value was significantly lower than the above three types, but generally decreased \(\rightarrow\) increased. As described above, although the 4 types show different ranges of the viscoelastic adhesion strength, the trend in the peel load value variation at peel-off section interval shows an increase or decrease, confirming a relation to an overall adhesion stability with regards to the adhesion area of the whole specimen. The verification method is to subdivide the increase/decrease pattern of the peel load value for each P1-P10 section derived from the viscoelastic adhesion strength, and calculate the coefficient of variation, grade of the linear regression line, and percent relative range. Adhesion stability was evaluated \begin{table}
\begin{tabular}{c c c c c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**P(0)**} & \multicolumn{8}{c}{**Peel Length P Interval (mm)**} & \multicolumn{8}{c}{**Average Peel off Load and Adhesion Strength**} \\ \cline{2-13}  & **30** & **40** & **50** & **60** & **70** & **80** & **90** & **100** & **110** & **120** & **Average Peel off Load** & **Visco-Elastic** \\ \cline{2-13}  & **P1** & **P2** & **P3** & **P4** & **P5** & **P6** & **P7** & **P8** & **P9** & **P10** & **(N), Ps** & **Adhesion Strength** \\ \hline \textbackslash{} & 266.0 & 284.0 & 271.0 & 267.5 & 262.0 & 259.9 & 262.0 & 244.5 & 110.0 & 239.0 & 246.6 & & \\ \textbackslash{} & 272.5 & 226.0 & 208.0 & 202.0 & 209.5 & 219.0 & 220.5 & 220.0 & 214.5 & 209.5 & 220.2 & 234.1 & 2.34 \\ \textbackslash{} & 251.5 & 247.0 & 243.5 & 243.0 & 242.0 & 235.0 & 226.0 & 230.0 & 222.5 & 216.5 & 235.7 & & \\ \hline \hline \end{tabular}
\end{table} 
Table 7: VG-3 viscoelastic adhesive strength test results. \begin{table}
\begin{tabular}{c c c c c c c c c c c c c c} \hline \hline \multirow{2}{*}{**\#**} & \multicolumn{8}{c}{**Peel Length P Interval (mm)**} & \multicolumn{8}{c}{**Average Peel off Load and Adhesion Strength**} \\ \cline{2-13}  & **30** & **40** & **50** & **60** & **70** & **80** & **90** & **100** & **110** & **120** & **Average Peel off Load** & **Visco-Elastic** \\ \cline{2-13}  & **P1** & **P2** & **P3** & **P4** & **P5** & **P6** & **P7** & **P8** & **P9** & **P10** & **(N), Ps** & **Adhesion Strength** \\ \hline \textbackslash{} & 89.0 & 91.0 & 93.5 & 100.0 & 101.5 & 95.5 & 92.0 & 90.5 & 89.5 & 88.5 & 93.1 & & \\ \textbackslash{} & 86.0 & 82.0 & 81.5 & 96.0 & 90.5 & 82.0 & 83.5 & 82.0 & 113.0 & 115.2 & 91.2 & 95.4 & 0.95 \\ \textbackslash{} & 89.0 & 72.5 & 71.0 & 82.0 & 93.5 & 117.5 & 126.5 & 134.0 & 110.0 & 122.0 & 101.8 & & \\ \hline \hline \end{tabular}
\end{table} 
Table 8: VG-4 viscoelastic adhesive strength test results. according to the methodology outlined in the following Section 4.2 using basic statistical analysis techniques.