Technical specifications Gravel grids

INTRODUCTION

The honeycomb structure, together with the thermally bonded and water permeable geotextile, ensures the stability of the gravel. The sheets are placed on a substructure, which is constructed in accordance with the loads to be expected. The sheets are then filled and covered with decorative gravel or pebbles. This prevents the gravel or pebbles from shifting any further. This creates an extremely robust basis, and yields a surface that can be driven or walked on with the greatest of ease and in all weather, albeit not with intense frequency.

PROPERTIES

Properties of the honeycomb structure

  • Sheet dimensions (*): 160 x 120 cm
  • Sheet height (**): 4 cm (ECCOgravel 40) or 3 cm (ECCOgravel 30)
  • Honeycomb diameter: 43 mm
  • HDPE density: 0.95 g/cm³
  • Honeycomb material: 100% HDPE - high-density polyethylene
  • Colour ECCOgravel white: Milky white with occasional slight nuances
  • Colour ECCOgravel black: Black
  • Breaking strain, unfilled:  ISO 844 - 90 tonnes/m²
  • Breaking strain, filled : ISO 844 - ton 400 tonnes/m²

Geotextile properties

  • Material: Non-woven polyester
  • Colour: White
  • Geotextile weight: 50 g/m²
  • Geotextile bonding: Adhesion resistance to honeycomb structure
  • Geotextile overlap: On two sides of the sheet
  • Tensile strength: 65 N/5 cm (EN 29073/3)
  • Resistance to cracking: 70 N (DIN 53363)

Mechanical properties

  • Flexibility: Very high
  • Chemical stability: Very high
  • UV stability: With prolonged exposure: yes / During indoor storage: not applicable
  • Coefficient of thermal expansion: n/a (the expansion forces are absorbed by the flexibility of the sheet)
  • Cold temperature behaviour: Retains its flexibility

Practical properties

Height (**)

Length x Width (*)

m²/sheet

gravel /m²

4 cm

160 x 120 cm

1.92

80 kg

3 cm

160 x 120 cm

1.92

65 kg

* with a tolerance of about 2 %
** with a tolerance of about 1.5 mm