The drainage layer shall consist of a Geotextile lining and a sand material of the material type and thickness as shown in Annexure 501A. The drainage layer shall be constructed immediately below the Pavement to the details shown in the drawings, and connected to a positive drainage system. 501.32.02 GEOTEXTILE The Geotextile shall be a non-woven fabric consisting of long chain synthetic polymer fibres composed of at least 85% by mass of polyesters, polyolefins or polyamides. The fibres shall be formed into a fabric by needle punching, heat or chemical bonding processes such that they are capable of retaining their relative position in the Geotextile. In addition, the fibres shall be stabilised against ultra-violet (UV) radiation and shall have low water absorbency. The Geotextile shall be free of any flaws or defects that may adversely affect the mechanical or physical properties of the fabric. Each roll of Geotextile shall be provided with a suitable covering to protect Covering the fabric against moisture and ultra-violet radiation. Each roll shall be marked in conformance with AS 3705. Rolls shall be stored on site under a waterproof cover and shall be Storage supported off the ground. The Contractor shall take appropriate measures to protect the Geotextile from damage. The Geotextile shall comply with the requirements shown in Table 501A6 Properties and Table 501A7 of Annexure 501A. All properties represent minimum roll values, that is, the test result from any sampled roll shall exceed the minimum value in Table 501A6. 501.32.03 INSTALLATION OF GEOTEXTILE The Contractor’s process of installation of the Geotextile shall ensure that fabric is not damaged. The initial lift thickness of fill materials placed directly over the Geotextile Initial Lift shall be a minimum uncompacted thickness of 300mm. The use of vibratory compaction equipment over the Geotextile should be minimized for the initial lift. Unless otherwise shown on the Drawings, the minimum overlap Overlap requirement shall be 300mm. Successive sheets of Geotextile shall be overlapped a minimum of 300mm with the upslope section overlying the down slope. The period of time between laying out and cover of the Geotextile shall not Timing exceed 14 days. Damaged areas of Geotextile may be repaired by overlaying the damaged Repairs section with a patch. The patch shall extend a minimum of 1 metre beyond the area of damage.
The drainage layer shall consist of a Geotextile lining and a sand material of the material type and thickness as shown in Annexure 501A. The drainage layer shall be constructed immediately below the Pavement to the details shown in the drawings, and connected to a positive drainage system. 501.32.02 GEOTEXTILE The Geotextile shall be a non-woven fabric consisting of long chain synthetic polymer fibres composed of at least 85% by mass of polyesters, polyolefins or polyamides. The fibres shall be formed into a fabric by needle punching, heat or chemical bonding processes such that they are capable of retaining their relative position in the Geotextile. In addition, the fibres shall be stabilised against ultra-violet (UV) radiation and shall have low water absorbency. The Geotextile shall be free of any flaws or defects that may adversely affect the mechanical or physical properties of the fabric. Each roll of Geotextile shall be provided with a suitable covering to protect the fabric against moisture and ultra-violet radiation. Each roll shall be marked in conformance with AS 3705. Covering Rolls shall be stored on site under a waterproof cover and shall be supported off the ground. The Contractor shall take appropriate measures to protect the Geotextile from damage. Storage The Geotextile shall comply with the requirements shown in Table 501A6 and Table 501A7 of Annexure 501A. Properties All properties represent minimum roll values, that is, the test result from any sampled roll shall exceed the minimum value in Table 501A6. 501.32.03 INSTALLATION OF GEOTEXTILE The Contractor’s process of installation of the Geotextile shall ensure that fabric is not damaged. The initial lift thickness of fill materials placed directly over the Geotextile shall be a minimum uncompacted thickness of 300mm. The use of vibratory compaction equipment over the Geotextile should be minimized for the initial lift. Initial Lift Unless otherwise shown on the Drawings, the minimum overlap requirement shall be 300mm. Successive sheets of Geotextile shall be overlapped a minimum of 300mm with the upslope section overlying the down slope. Overlap The period of time between laying out and cover of the Geotextile shall not exceed 14 days. Timing Damaged areas of Geotextile may be repaired by overlaying the damaged section with a patch. The patch shall extend a minimum of 1 metre beyond the area of damage. Repairs
Specification%20%20501%20Pavements%20%2029%20June%202018.RCN-D18^23564355.DOCX