Just 4 easy steps:
- Level and compact soil for BASE PREPARATION. For subgrade or base preparation, level and clear the area of large objects such as rocks, or pieces of wood. Excavate area allowing for unit thickness and top layer. Leave 10 mm (0.4 inches) above COREgravel® for top layer to meet final grade.
- Cut and PLACE THE PANELS. Position the panels on the prepared subgrade with geotextile face down. Cut to shape with pruning shears or a utility knife. Use protective gloves to avoid abrasions. Top of hexagon cell panels should be 1 cm below adjacent hard surfaced pavements or final grade.
Place first row of panels against a stationary edge if possible. Stagger panels in a bricklayer pattern. The panels have interlocking connectors, however most installations do not require them to be used. Only in areas with greater traffic or steeper grade are they used to lock one direction or both directions. No anchors are needed for gravel stabilizer panels since the geotextile backing prevents any push up.
- Spread gravel evenly to FILL THE CELLS. Infill gravel or aggregate into the hexagon cells by hand, or by ‘back dumping’ directly from a truck. Trucks should be careful to avoid sharp turns on unfilled panels. Preferably the truck would dump gravel first on the edge of the installation area, then working inward, therefore only driving on filled cells. Gravel can be spread by hand with flat shovels, asphalt or tarmac rakes, blades, or stiff brooms. A power broom may spread the gravel faster.
- Ready to use after you SMOOTH SURFACE. Level gravel or aggregate to cover COREgravel® gravel stabilizer panels by 1 cm (0.4 inches) so the panels are just out of sight. This allows for aesthetics, stability and protection. Optionally, a vibratory plate, compactor, or roller can be used to set the gravel into the cells.
Also, COREgravel® installs can vary, here are a few examples.
Install a 15–30 cm (6–12 inch) sub-base of crushed rock beneath the COREgravel®. Common crushed stone known as AASHTO #57 and is often used in concrete or as drainage bases is recommended, however other types and sizes will work too. Installation of rainwater storage, or an alternative drainage product/system can also be used. A 10-15 cm (4-6 inch) layer of sharp sand on top of the crushed rock is needed for drainage, leveling and protecting the geotextile.
Maximize Strength & Traffic
Install a 15–30 cm (6–12 inch) sub-base of crushed rock beneath the
COREgravel®. Common crushed stone known as AASHTO #57 and is often used in concrete or as drainage bases is recommended, however other types and sizes will work too. A 10-15 cm (4-6 inch) layer of sharp sand on top of the crushed rock is needed for drainage, leveling and protecting the geotextile.
Only use sharp angular gravel of the specific size recommended.
Slopes and grades greater than 30˚ (1:3.3)
Install as directed for installation, however after Step 2, install anchors. This will keep the COREgravel® panels in place in areas where there is a slope greater than 30o or 1:3.3.