## 3 Results and Discussion
### Creep Characteristics of Asphalt Mixtures
#### 3.2.2 Fitting Analyses of Creep Compliance
\begin{table}
\begin{tabular}{c c c c c c c c c} \hline \hline \multirow{2}{*}{**Parameters**} & \multicolumn{8}{c}{**Asphal Mixture Types**} \\ \cline{2-10}  & **AC** & **DRAC** & **SAC** & **SDRAC** & **SMA** & **DRSMA** & **SSMA** & **SDRSMA** \\ \hline \(E_{1}\) (MPa) & 37.64 & 45.40 & 51.87 & 63.35 & 40.43 & 42.53 & 54.55 & 59.48 \\ \(\eta_{1}\) (MPa\(\cdot\)s) & 1,144,973 & 2,905,223 & 2,605,226 & 4,080,010 & 995,060 & 2,025,960 & 3,006,142 & 3,105,033 \\ \(E_{2}\) (MPa) & 152.60 & 290.97 & 311.97 & 344.94 & 153.31 & 203.13 & 321.60 & 345.53 \\ \(\eta_{2}\) (MPa\(\cdot\)s) & 15,099 & 24,906 & 28,615.28 & 25,735 & 19,290 & 15,868 & 27,903,37 & 28,416 \\ R\({}^{2}\) & 0.9874 & 0.9870 & 0.9869 & 0.9849 & 0.9902 & 0.9854 & 0.9865 & 0.9864 \\ \hline \(E_{1}\) (MPa) & 38.75 & 46.18 & 52.79 & 64.89 & 41.63 & 43.73 & 55.70 & 60.64 \\ \(A\) & 9292 & 16,249 & 18,766 & 15,714 & 12,014 & 952 & 17,192 & 18,361 \\ B & 0.0200 & 0.0207 & 0.0194 & 0.0250 & 0.0161 & 0.0246 & 0.0220 & 0.0217 \\ \(E_{2}\) (MPa) & 213.49 & 527.71 & 495.59 & 692.21 & 186.10 & 361.31 & 539.91 & 586.58 \\ \(\eta_{2}\) (MPa\(\cdot\)s) & 216,198 & 492,349 & 534,803 & 539,234 & 214,929 & 309,185 & 486,910 & 586,547 \\ R\({}^{2}\) & 0.9981 & 0.9956 & 0.9953 & 0.9947 & 0.9983 & 0.9956 & 0.9966 & 0.9959 \\ AB & 185.84 & 336.35 & 364.06 & 392.85 & 193.43 & 234.24 & 378.22 & 398.43 \\ \hline \hline \end{tabular}
\end{table} 
Table 7: Parameter calculation results of Burgers model and modified Burgers model. The solution results of the Burgers model show adding rubber particles and diatomic can increase the instantaneous elastic modulus \(E_{1}\) and viscosity coefficient \(\eta_{1}\) of the matrix asphalt mixture, which shows that the ability of the asphalt mixture to resist instantaneous elastic deformation and the ability to resist permanent deformation under load can be improved by adding diatomic and rubber particles. Comparing the fitting results of different gradations, it can be found that the improvement effect of diatomic and rubber particles on the suspended dense asphalt mixture is greater than that of the skeleton dense asphalt mixture. This is mainly due to the adverse effect of the addition of rubber particles on the skeleton embedding effect of the dense skeleton asphalt mixture. From the perspective of different asphalt binders, it can be seen that when SBS modified asphalt is used as a binder, as the improvement of diatomic the resistance of diatomaceous earth and rubber particles to the asphalt mixture against instantaneous elastic deformation and the ability to resist permanent deformation are more obvious. The SBS modified asphalt with higher binding capacity can promote the enhancement of diatomic and rubber particles. It can be found from the parameters of the modified Burgers model that the result of the instantaneous elastic modulus is close to that of Burgers and has the same changing trend. It can be seen from the fitting results of \(E_{2}\) and \(AB\) that adding the diatomic and rubber particles can improve the resistance viscoelastic deformation and irreversible permanent deformation of the asphalt mixture, and the improvement effect of the suspended dense matrix asphalt mixture is higher than that of the skeleton dense matrix asphalt mixture.