Seal Design
Version: 1.1.12
Reference: MELANESIA RD-50-372-all-39182 SDH ID: 12968
Status: Client Submitted
Reseal
GENERAL SITE INFORMATION
Client
Season
Auckland City
FY 2025/2026
Contract
Design Date
AT Central
01-Oct-2025
Site Name
Project No
MELANESIA RD-50-372-all-39182
553303
Road Name
RP Start
RP End
MELANESIA RD
50
372
STRESS MAP GRAPH
LAYER STABILITY GRAPH
TEXTURE HEATMAP GRAPH
RUTTING HEATMAP GRAPH
Treatments
Treatment Instruction
T4/6 PME -
Spray full width of 1.12 L/m2 - Lay Grade 4 on bottom coat.
Construction Timing Risk
Design Life
1
-
-
-
-
-
-
-
-
Treatment
Code
RS46
-
-
-
-
-
-
-
-
Use In Design
Yes
Design Life
8.13
ELV
2,608
Largest Chip Size
4
Largest Chip ALD
7.22
Texture Life
10.00
Binder Life
8.13
Polishing Life
-
Use In Design
Yes
Design Life Reduction Required
Proposed Design Life
7
(years)
RISK PROFILE
Treatment 1 -
High Stress. A percentage of this site, identified as Stress Factor 4-5 sections will be susceptible to increasing
RS46
degrees of chip roll-over and associated binder tracking or even chip loss; particularly whilst the seal is
orientating and/or during periods of sustained high temperature. CSNS 174-176. T10 performance is likely to
be compromised in this situation.
SCRIM. Summer traffic loading from access road turning may cause chip roll over with binder tracking. This
could result in early texture P17 and T10 (SCRIM) failure.
SCRIM. Expect P17 texture and T10 failure to occur in the first summer.
Residential. Property accessway turning stress (dinner plate power steering) are likely to cause chip rollover,
binder rise, binder tracking and flushing, especially in elevated pavement temperatures.
Performance. Downer NZ accept no liability for chip-loss or flushing as a result of this treatment selection.
Layer Stability. Please note - Where seal depths exceed 40mm expect layer instability. Due to the depth of
seals on site the expected seal design life is difficult to access and is very likely to be significantly shorter
than previous seal lives. Chipsealing NZ pages 113 & 177 refers.
Layer Stability. Surface Hardness (Layer Stability)
This site has in excess of 5 seal layers (>40mm) potentially affecting Layer Stability.
Texture Measurement Performance Criteria for Table 2 P17 and Table 3 T10 cannot be guaranteed
particularly with consideration of traffic volume and prolonged elevated pavement temperature.
Isolated G4 dry chipping treatments may be required on arrival to site for flushed areas. Keep G4 Dry chip
windows open.
Coarse texture/ Scab areas must be texturised as a preseal repair.
Spray rate on shaded areas will be adjusted while spraying the bottom coat on the run. Adjustment factor of
(+/-) 0.05 L/m² decided by the foreman according to the site conditions.
Sign Off
Seal Design:
Designed By:
Hari AshokKumarNandhini
Date:
01-Oct-2025
Peer Review:
Reviewed By:
Paul Reilly
Date:
02-Oct-2025
Melanesia Road – Site ID 12968 – RP 50–372 – G4/6 PME – Steep
gradient, existing flushing, pre reseal repairs are required prior to sealing.
Dry chipping on flushed areas will be required prior to sealing. Parking
bays on both shoulders, spray rate will need to be increased with additional
rolling on these untrafficked areas. This is an urban site, damage may
occur from slow turning vehicles entering and exiting driveways / parking
bays. The prescribed treatment is suitable for the existing surface texture,
environment and site conditions.
Client:
Awaiting Client agreement/rejection
