## 5 Analysis of Test Results
### Influence of Type of Viscosity Oil  
The viscosity-level oil A and B are quick-cracking emulsified asphalt. The main difference is that the content of evaporative residue of oil A is 59.4% and that of oil B is 64.1%. The penetration and elongation of the evaporative residue in oil A are 140% and 53% higher than that in oil B. Specific experimental data are shown in Figures 13-16. Figure 14: Adhesion coefficient curve of viscosity-level oil A and B specimens at 0 \({}^{\circ}\)C.  
Figure 13: Adhesion coefficient curve of viscosity-level oil A and B specimens at \(-\)10 \({}^{\circ}\)C. \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**Temperature** & **Viscosity-Level Oil A** & \
\begin{tabular}{c} \(K_{\text{max}}\) **Corresponds to** \\ **the Spreading Amount** \\ **of Viscosity-Level Oil** \\ \end{tabular} & **Viscosity-Level Oil B** &
\begin{tabular}{c} \(K_{\text{max}}\) **Corresponds to** \\ **the Spreading Amount** \\ **of Viscosity-Level Oil** \\ \end{tabular} \\ \hline \(-\)10 \({}^{\circ}\)C & \(\text{y}=-351.68\text{x}^{2}+553.75\text{x}+1692.6\) & 0.78 kg/m\({}^{2}\) & \(\text{y}=-395.65\text{x}^{2}+425.09\text{x}+1605.6\) & 0.54 kg/m\({}^{2}\) \\ \hline \(0\) \({}^{\circ}\)C & \(\text{y}=-313.02\text{x}^{2}+565.13\text{x}+1149.7\) & 0.90 kg/m\({}^{2}\) & \(\text{y}=-397\text{x}^{2}+485.2\text{x}+1182.2\) & 0.61 kg/m\({}^{2}\) \\ \hline \(25\) \({}^{\circ}\)C & \(\text{y}=-658.01\text{x}^{2}+1020.4\text{x}+219.54\) & 0.78 kg/m\({}^{2}\) & \(\text{y}=-264.55\text{x}^{2}+347.35\text{x}+291.1\) & 0.65 kg/m\({}^{2}\) \\ \hline \(50\) \({}^{\circ}\)C & \(\text{y}=-537.72\text{x}^{2}+799.75\text{x}+200.39\) & 0.74 kg/m\({}^{2}\) & \(\text{y}=-53.46\text{x}^{2}+73.25\text{x}+198.14\) & 0.68 kg/m\({}^{2}\) \\ \hline \hline \end{tabular}
\end{table} 
Table 9: The best range of adhesive oil spread. At the different temperatures, viscosity-level A and B have corresponding adhesion coefficients under different spreading amounts, and the polynomial curve is fitted according to the measured values. Figures 13-16 show the following features:  
1. When the ambient temperature is \(-10\)\({}^{\circ}\)C, the adhesion coefficient corresponding to the three spreading amounts of viscosity-level oil A is superior to that for viscosity-level oil B. However, the spreading amounts of viscosity-level oil A are 1.0 and 1.5 kg/m\({}^{2}\), and their maximum adhesion coefficients \(K_{\rm max}\) are close. Therefore, the trend line of viscosity-level oil A does not have obvious regularity. 2. The maximum adhesion coefficients \(K_{\rm max}\) of viscosity-level oil A and B are almost the same when the spreading amount is 0.5 kg/m\({}^{2}\) and the ambient temperature is 0 \({}^{\circ}\)C. With the increase in the spreading amount, the \(K_{\rm max}\) increases first and then decreases, while that of oil B decreases, obviously. 3. When the ambient temperature is 25 \({}^{\circ}\)C, the \(K_{\rm max}\) of viscosity-level oil A is obviously better than that for oil B only when the spreading amount is 1.0 kg/m\({}^{2}\). 4. The maximum adhesion coefficient \(K_{\rm max}\) of viscosity-level oil A has an obvious trend, while the \(K_{\rm max}\) of oil B remains essentially unchanged at the 50 \({}^{\circ}\)C ambient temperature. According to the above analysis, it can be found that \(K_{\rm max}\) has changes significantly when the ambient temperature is low; however, the trend is not obvious at high ambient temperature. The main reason is that asphalt is a temperature-sensitive material, and the temperature change has a strong impact on it. At high temperature, the softening viscosity drops sharply, which causes the interlayer shear resistance to decrease, and then  
Figure 16: Adhesion coefficient curve of viscosity-level oil A and B specimens at 50 \({}^{\circ}\)C.  
Figure 15: Adhesion coefficient curve of viscosity-level oil A and B specimens at 25 \({}^{\circ}\)C.  
the interlayer interlocking effect decreases and the bonding state weakens sharply.