Table 4 The splitting strength of the polyurethane mixture used for tunnel pavement, compared to the conventional asphalt mixture
Type of mixture | Gradation type | Splitting stregth | Technical requirements (Residual value, %) | Test method | ||
|---|---|---|---|---|---|---|
Before the first freeze-thaw cycle (MPa) | After the first freeze-thaw cycle (MPa) | Residual value (%) | ||||
Polyurethane mixture | AC-10 [39] | 5.8 | 2.5 | 43.1 | – | T 0729 in JTG E20-2011, China |
OGFC-10 [39] | 3.7 | 2.0 | 54.1 | |||
Asphalt mixture | AC-16I [95] | 0.825 | 0.670 | 81.2 | ≥70.0 | |
AC-13I [95] | 0.825 | 0.587 | 71.2 | |||