Effect of Rejuvenated Binder on the Pavement Rutting Performance at Different Aging Levels
Table 7
LWT rut depth test results, 50°C wet.
Mix aging level
Mix composition
Rut depth at 20000 passes (mm)
Average
Std. Dev.
Groupings
1-hr aging at 165°C
Virgin aggregate + Virgin binder
21.4
3.6
C
RAP + 7.9% RA1
1.7
0.3
A
RAP + 15.7% RA1
22.9
1.2
C
RAP + 6.5% RA2
3.1
0.7
A
RAP + 11.3% RA2
16.4
3.3
B
5-day aging at 85°C
Virgin aggregate + virgin binder
4.7
0.5
B/C
RAP + 7.9% RA1
2.4
0.7
A
RAP + 15.7% RA1
10.1
3.0
D
RAP + 6.5% RA2
3.7
0.4
A/B
RAP + 11.3% RA2
6.0
1.0
C
10-day aging at 85°C
Virgin aggregate + virgin binder
3.6
0.4
A/B
RAP + 7.9% RA1
NM
NA
NA
RAP + 15.7% RA1
4.1
0.5
B
RAP + .5% RA2
3.3
0.5
A
RAP + 11.3% RA2
3.3
0.8
A
NA: not applicable; NM: not measured as the specimen was damaged; COV: coefficient of variation. Statistical groupings were based on Tukey’s analysis at a 95% confidence level.
