Kingscote Streets Upgrades - Kangaroo Island Council

Mechanical spreading equipment shall be used to spread aggregate and capable of achieving a
uniform spread rate. Spreading equipment shall be calibrated as detailed in the quantity
requirements of this specification.
Rollers shall be pneumatic tyred multi-wheel rollers with a minimum mass of 7 tonnes, smooth tyres
and a minimum tyre pressure of 690 kPa. Rollers must be capable of achieving effective
incorporation of aggregate into the binder without breakdown or crushing of the cover aggregate.
7.4.9 Pavement Temperature and Weather Conditions
The Contractor shall measure and record pavement temperatures at regular intervals during the
works using appropriate equipment and measurement procedures.
Spraying of primers, primer binders and binders should only be undertaken if the pavement
temperature has been at or above the temperature shown in the following table and does not fall
below the recommended minimum pavement temperature during the period of spraying.
Table 7.1
Type of work
Minimum Pavement Temperatures
Minimum Pavement Temperature
Priming 10°C
Primer Sealing 10°C
Sealing – Class 170, Class 320 15°C
Sealing – Bitumen Emulsion 15°C
Sealing – Polymer Modified Binder 20°C
Spraying shall not be carried out on a wet pavement, while rain appears imminent orduring strong
winds (wind speed greater than 20 km/hour) or dust storms.
Surfaces to be primed should be dry, and no more than damp to the depth of pavement penetration.
If necessary, the pavement surface may be lightly watered shortly before applying the primer binder.
Surfaces to be sealed should be dry and clean.
7.4.10 Primer and Primer-Binder
7.4.11 Binder
The class grade and rate of application of the primer or primer-binder shall be as detailed in the
approved pavement design and confirmed by the Contractor based on site conditions.
After the application of the primer, a period of at least 48 hours, or a longer period as required to
obtain a thoroughly dry surface prior to the application of the binder for a seal is applied. Subject to
the site conditions, the Superintendent may authorise a shorter curing period.
Traffic shall be kept off the primer surface until it has dried sufficiently to minimise the risk of damage
to the surface. The Contractor shall supply, place and maintain traffic management necessary to
comply with this requirement.
The class or type of bitumen, modified bitumen, cutback bitumen, or bitumen emulsion shall be as
specified in the Contractors spray seal pavement design and confirmed by the Contractor based on
site conditions.
No binder shall be placed until the Superintendent has inspected and approved the prepared
pavement surface.
The Contractor shall determine and record the proportion of cutter oil required for each spray load.
Cutter oil shall be added at the site in accordance with DTEI Master Specification Part 226
Appendix 5. Flux shall not be used.
Bitumen adhesion additives shall comply with DTEI Master Specification Part 226.
Ref No. 20120236SA1 Kingscote Streets Upgrades Technical Specification 33