Relevant Standards
- AS 1141.33
- AS 3727
- Where doubt exists as to the acceptability of the fine content of base material or sand, it shall be tested in accordance with AS 1141.33, a summary of which is appended to this specification.
Commencement
Work shall commence as soon as practical after, but not before,
(a) the Builder has issued:
- a written order
- the relevant contract drawings, specifications and schedule of work
- written approval of any details provided by the Contractor
(b) site earthworks and landscaping have reached a stage such that the paving can be efficiently carried out.
General
Asphalt residential pavements within the property boundary shall be designed and constructed in accordance with AS 3727 Clause 10 and Table 4 Medium Duty, unless stated otherwise on the drawings.
Pavements outside the property boundary may be subject to additional local government or road authority requirements.
Construction
Pavement Design
Unless stated otherwise on the drawings, residential pavements shall comply with AS 3727 and the following:
- Areas subjected to pedestrian traffic only:
- 25 mm AC 5 on 100 mm base (Class S/M sites)
- 75 mm AC 5 full depth (Class S/M sites)
- 25 mm AC 5 on 50 mm of base (Class A sites)
- 50 mm AC 5 full depth (Class A sites)
- Areas subjected light vehicular traffic only:
- 30 mm AC 10 on 150 mm base (Class S/M sites)
- 100 mm AC 10 full depth (Class S/M sites)
- 30 mm AC 10 on 100 mm of base (Class A sites)
- 75 mm AC 10 full depth (Class A sites)
- Areas subjected to medium vehicular traffic:
- 35 mm AC 10 on 200 mm base (Class S/M sites)
- 125 mm AC 10 full depth (Class S/M sites)
- 35 mm AC 10 on 150 mm of base (Class A sites)
- 100 mm AC 10 full depth (Class A sites)
Drainage System
The completed pavement shall drain to gutters, channels or pits that are proportioned to remove all rainwater. See the specification for subgrade. Where water is likely to seep through the pavement and enter the subgrade, subsurface drainage pipes shall be provided to drain to the stormwater system. The lip of gutters, channels and drainage pits shall be 10 mm below the finished level of the adjacent pavement to ensure that it drains freely. Drainage pits shall include sub-surface inlet slot to remove subsurface water. All drainage and service trenches beneath the pavement shall be backfilled and compacted with base course material in layers not exceeding 150 mm in depth to 98% Standard Compaction to AS 1289.
See also Drainage Voids in Plumbing and Drainage?
Services
All existing services under the pavement shall be located, the position pegged and marked on the plans. Compacted fill, base course or lean-mix concrete shall provide sufficient cover to protect these services from damage during construction and in service. All newly laid services shall be backfilled with base course material and compacted in layers not exceeding 150 mm in depth to 98% Standard Compaction in accordance with AS 1289.
Edge Restraints
Edge restraints such as kerbs and compacted material behind them shall be constructed such that they prevent the lateral movement of the pavement or basecourse course under the action of traffic. The face of the restraint shall be vertical down to the level of the base course except that the top corner of this face shall have a 5 mm radius.
Subgrade Preparation
Subgrade preparation shall extend a distance equal to the total depth of the pavement past the face of all edge restraints. The subgrade shall be excavated or filled, compacted and trimmed as indicated on the drawings to a tolerance of +0,-25 mm of the nominated levels. In the absence of specific falls nominated on the drawings, a minimum of 2% cross fall shall be provided. This shall be increased as necessary to prevent the ponding of water. All fill shall be compacted in layers not exceeding 150 mm in depth to 98% Standard Compaction in accordance with AS 1289.E2.1. The completed subgrade shall be proof-rolled before the laying of base material to identify soft spots.
Basecourse
Basecourse shall extend a distance equal to the total depth of the pavement past the face of all edge restraints. The basecourse shall be compacted and trimmed as indicated on the drawings to a tolerance of +25,-0 mm except adjacent to existing structures where it shall be +10 mm, -0 mm of the nominated levels. The surface shall not deviate more than 10 mm in any 3 m length. In the absence of specific falls nominated on the drawings, a minimum of 2% cross-fall shall be provided. This shall be increased as necessary to prevent the ponding of water. All basecourse shall be compacted in layers not exceeding 100 mm in depth to 98% Modified Compaction in accordance with AS 1289.E2.1. This compaction is deemed to be achieved by at least three passes of a vibrating plate compactor. The completed basecourse shall be proof compacted to identify soft spots before constructing the pavement.
Asphalt
The hot mixed asphalt course shall be constructed using mechanical rollers in accordance with AS 2734. It shall be permissible to compact inaccessible areas with a vibratory plate or hand tamper. The asphalt shall be compacted hot (i.e. above 140oC) to achieve a site density of not less than 95 percent of the 50 blow laboratory measured Marshall density, in accordance with AS 2150.
Pavement Tolerances
All surfaces of the completed pavement, prior to trafficking, shall be within +,- 10 mm of the levels required on the drawings. The surface shall not deviate by more than 10 mm from the bottom edge of a 3.0 metre straight edge laid in any direction of an area of uniform grade.
Materials
Inspections and Tests
[+]
All new work shall remain open until it has been inspected and approved by the Builder.
The following inspections and tests shall be performed.
| Item or Product | Inspection Required | Accept Criteria | Hold / Witness
|
| Drawings & Specifications | Inspect controlled documents | Controlled copy of latest issue on site | Hold
|
| Base course | Visual * | As specified | Witness
|
| Asphalt | Visual * | As specified | Witness
|
| Set out | Measure by tape | +,- 20 mm | Hold
|
| Level datum | Level | +,- 10 mm | Hold
|
| Level of boxing out | Level | +0 mm, -50 mm | Hold
|
| Base course compaction | Visual | 98% Modified | Witness
|
| Level on base course | Level | +10 mm, -0 mm | Hold
|
| Edge restraint | Visual | As specified | Witness
|
| Finished pavement | Visual | As specified | Witness
|
| Base course | Visual * | As specified | Witness
|
| Asphalt | Visual * | As specified | Witness
|
| Set out | Measure by tape | +,- 20 mm | Hold
|
| Level datum | Level | +,- 10 mm | Hold
|
| Level of boxing out | Level | +0 mm, -50 mm | Hold
|
| Base course compaction | Visual | 98% Modified | Witness
|
| Level on base course | Level | +10 mm, -0 mm | Hold
|
| Edge restraint | Visual | As specified | Witness
|
| Finished pavement | Visual | As specified | Witness
|
Notes
All tolerances shall be as shown, except where overridden by AS 3727. |
Created by admin.
Last Modification: Thursday 09 of July, 2009 14:18:15 EST by admin.
(Version 3)
