Technical information

2-6
dry density values were 138.0 (2213 kg/m³) for both sections. With respect to dry
densities, the relative compaction degree for the base layer in both sections was 100.1%.
The as-built moisture content varied slightly: 6.4% in section N1 and 6.6% in section
N2.
Figure 2.2.3: Gradation of base material at N1 and N2 sections (Timm and Priest,
2006).
2.2.4 Hot Mix Asphalt
Figure 2.2.4 presents the sub-layering of the HMA in the different test sections in the
‘structural study’ (Timm and Priest, 2006). Sections N1 and N2 were paved in three lifts
to a total HMA thickness of 5 in. (127 mm). The bottom and intermediate lifts are each
2 in. (50.8 mm) thick while the top lift is 1.0 in. (25.4 mm) thick.