Figures & data
Figure 1. Mean gradation curves of the three kinds of pavements tested.
Figure 2. Correlation coefficient for the reference surfaces.
Figure 3. Correlation coefficient for the rubberised surfaces.
Figure 4. Adjusted coefficient of determination for reference surfaces for each couple of CPX band and enveloped texture band.
Figure 5. Adjusted coefficient of determination for rubberised surfaces for each couple of CPX band and enveloped texture band.
Figure 6. Reduced matrix of the t-values for the regression slopes. Blue cells highlight regions where the regressions are statistically different, while red cells identify zone where no statistical difference is found.
Figure 7. Examples of linear regression of data. The left figure shows a case where the parallelism test was successful. On the right, two statistically different regressions are plotted.
