Best Practice – Sealed
Surfacings
Current practice in sealed
surfacings is listed in order of life cycle cost ($/m2/yr) from lowest to
highest. Also
shown are the key variables affecting life cycle cost identified in pilot
council testing.
Care
is to be taken in interpreting the best practice reports as there are many
factors which affect life cycle costs including pavement strength, availability
and cost of aggregate materials, haul distance of bitumen and higher relative
costs of asphalt surfacing providing additional benefits above spray seals.
To see full details for each example, click on the Council
name hyperlink.
|
Council |
New Seal Type |
LCC ($/m2/yr) |
Est. Seal life (yrs) |
Traffic (AADT) |
% Heavy Vehicles |
Binder type |
|
Northern
Grampians (S) |
Single coat
sprayed seal |
$0.13 |
15 |
150-500 |
5-10% |
Cutback class
170 bitumen |
|
Ararat (RC) |
Single coat
sprayed seal |
$0.13 |
17 |
0 |
0 |
Polymer
modified bitumen |
|
Ararat (RC) |
Single coat
sprayed seal |
$0.13 |
18 |
0 |
0 |
Cutback class
170 bitumen |
|
Wangaratta
(RC) |
Single coat
sprayed seal |
$0.14 |
15 |
500-1000 |
5-10% |
Polymer
modified bitumen |
|
Northern
Grampians (S) |
Single coat
sprayed seal |
$0.15 |
15 |
150-500 |
5-10% |
Cutback class
170 bitumen |
|
Ararat (RC) |
Single coat
sprayed seal |
$0.15 |
14 |
10-150 |
1-5% |
Cutback class
170 bitumen |
|
Wangaratta
(RC) |
Single coat
sprayed seal |
$0.15 |
15 |
0-500 |
1-5% |
Polymer
modified bitumen |
|
Wangaratta
(RC) |
Single coat
sprayed seal |
$0.15 |
15 |
0-500 |
1-5% |
Polymer
modified bitumen |
|
Ararat (RC) |
Single coat
sprayed seal |
$0.18 |
10 |
0 |
0 |
Cutback class
170 bitumen |
|
Manningham
(C) |
Slurry seal |
$0.54 |
20 |
150-500 |
1-5% |
Bitumen
emulsion |