Appendix C 2.5 Seal Design
A summary of the seal design is provided in Table C 4.
Table C 4: Design calculations
| Attribute | Symbol | Units | 1st Application (14 mm) | 2nd Application (7 mm) |
|---|---|---|---|---|
| Traffic | – | AADT | 1800 | 1800 |
| Design traffic | – | v/l/d | 900 | 900 |
| Basic voids factor | Vf | – | 0.13 (Figure 6.4) | 0.16 (Figure 6.4) |
Adjustments: Aggregate shape Traffic effects Other | Va Vt – | L/m²/mm L/m²/mm L/m²/mm | 0.0 (Table 6.1) –0.02 (Table 6.2) Nil | –0.01 (Table 6.1) –0.02 (Table 6.2) Nil |
| Design voids factor Vf + Va + Vt | VF | L/m²/mm | 0.11 | 0.13 |
| ALD of aggregate | ALD | mm | 8.7 | 4.4 |
| Basic binder rate VF × ALD | Bb | L/m² | 0.11 × 8.7 = 0.96 | 0.13 × 4.4 = 0.57 |
| Binder factor | BF | – | 1.0 (Table 6.5) | 1.0 (Table 6.5) |
| Modified binder rate | Bbm | L/m² | 0.96 × 1.0 = 0.96 | 0.57 × 1.0 = 0.57 |
Allowances: Surface texture Binder Abs. by Agg. Binder Abs. by Pav. Embedment | Ast Aba Ap Ae | L/m² L/m² L/m² L/m² | +0.3 (Table 6.3) Nil (Section 6.2.4) Nil (Section 6.2.4) Nil (Section 6.2.3) | N/A Nil (Section 6.2.4) N/A N/A |
| Design binder rate Bbm + Ast + Aba + Ae | Bd | L/m² | 0.96 + 0.3 = 1.26 Adopt 1.3 | 0.57 Adopt 0.6 |
| Aggregate spread rate | – | m2/m3 | 950/ALD = 109.2 (Table 6.11) Adopt 110 | 900/ALD = 204.5 (Table 6.12) Adopt 205 |