O2D Mineral Foundation for access road

O2D mineral foundation for light vehicle access roads is recommended in the context of the development of paved access roads for permeable parking spaces.

This foundation material, which is recommended by O2D ENVIRONNEMENT, is comprised of open-graded crushed roadbed, with no fine particles. The technical characteristics of this mineral foundation material have been defined in conjunction with the TTE® permeable floor covering: TTE® grids for paving infill (O2D PAVE).

Recommended composition of mineral foundation:

• 15 cm thickness: 2/20 mm or 2/32 mm crushed roadbed foundation
• 3 cm thickness: 4/6 mm or 3/8 mm crushed roadbed bearing course

Prepared base / sub-base (-23 cm in relation to level 0):

• The requisite permeability below this foundation system is such that K > 10^-6 m/s
• The load-bearing level required is such that EV2 > 60 MPa (EV2/EV1 < 2)
• We recommend the installation of a permeable anti-contaminant geotextile membrane

This mineral foundation composition ensures both load-bearing capability and drainage.

It is recommended that the thickness of the sub-base (for example, 20/40 mm crushed drainage gravel) should be adjusted and/or any other facility should be incorporated, if the natural ground surface does not possess the requisite infiltration properties, or for the satisfaction of project design requirements.

The load-bearing level should be appropriate to the intended application.

Applications:
- Permeable paved light vehicule access road

Specification

Recommended deployment for the creation of a mineral foundation for permeable paved light vehicle access roads:
- Preparation of base structure
o Mechanical or manual execution of excavation and backfill operations, up to the sides of the base structure: - 23 cm in relation to level 0
o Surface adjustment and levelling to an altimetric accuracy of +/- 2 cm/m
o Confirmation of a permeability coefficient K > 10^-6 m/s
o Confirmation of the load-bearing capability of ground such that EV2 > 60 MPa, where EV2/EV1 < 2
o Clean-up of roadways employed
- Installation of edging to the concrete foundation, the shoulder of which, at its highest point, is 8 cm below the levelled surface.
- Installation of a permeable anti-contaminant geotextile membrane
- Execution of a draining foundation
o Adjustment, levelling and compaction of a foundation layer comprised of crushed roadbed of particle size 2/20 mm or 2/32 mm; finished thickness after rolling: 15 cm (or - 8 cm from the levelled edging surface).
o Levelling and compaction of a bearing course comprised of crushed roadbed of particle size 4/6 mm or 3/8 mm ; finished thickness: 3 cm (or - 5 cm from the levelled edging surface).
- Installation of O2D FYNET laying mesh
- Installation of TTE® grids, with paving infill (O2D PAVE)