Consider the local regulations when planning.
The new ACO Self® Gravel Grid withstands a surface load of up to 300 t/m² in accordance with DIN EN ISO 604. In curves and manoeuvring areas (occurrence of strong gravitational forces), the gravel stabilisation can be used in compliance with an graveled cover layer of 20 mm (see installation recommendation).
The subfloor profile must be determined according to local conditions and with a view to suitability for the anticipated load. In general, the substrate should be prepared as follows:
A levelled sand layer of 4-6 cm over a gravel layer of 15-25 cm. The soil structure must be mechanically compacted (e.g. compactor).
1. Border fixation
Create an border so that the mats do not move sideways and the surface becomes unstable as a result. Height and strength will depend on the anticipated load. Use a laser height finder to align the surface with the surrounding area.
A stable, compacted and water-permeable substrate is essential, as with other floor coverings. Failure to comply can result in the ACO Self® Gravel Stabilisation not withstanding the desired load.
After compacting the substrate, level the sand layer evenly and create a flat surface. Remove excess sand, debris and sharp objects.
The mats are laid loosely next to each other on the surface. The mats have a protruding geotextile on two sides. Make sure that the following mat is laid overlapping on the geotextile of the first mat. This ensures optimum stability.
It is advantageous to lay the mats in a bond rather than in a cross joint and, if possible, at right angles to the direction of travel.
5. cutting to shape
The mats are easy to cut with hand or power tools (e.g. hand saw or jigsaw). Precise cutting ensures that the mats fit tightly and securely within the surface edging.
Fill the mats with the desired gravel/chippings. Take into account the future load.
a) For lower loads, use a grain size of 3-16 mm. The filling should protrude 15-20 mm above the honeycomb height. Compaction is not necessary.
b) For higher loads, fill the honeycombs sufficiently with 3-8 mm grain size. Then compact and choose stones with a grain size of 3-16 mm to cover the honeycombs by 15-20 mm. Depending on the specific weight of the gravel type, approx. 80 kg of filling material is required.
Driving on the surface is only possible after filling!
7. completion and maintenance
Spread the gravel/chippings evenly with a rake. Maintenance is limited to raking and removing leaves and debris.
Important: The mats should always be completely covered with gravel for maximum durability. This can always be reapplied to the mats as needed and necessary so that they remain covered.