How it works
The gravel-bearing layer is the foundation of every artificial turf ground. With a minimum thickness of 200 mm it provides sufficient stability for the construction. The usual grain size of the gravel is 0/32 to 0/45mm. Gravel with low fine particle shares are used to ensure long-term frost resistance and water permeability.
This is supported by the gentle installation of the gravel-bearing layer with finishers. Due to the way the finisher works, segmentation of the gravel is avoided and the bearing layer is installed with constant layer thickness. This is possible thanks to the laser-controlled height setting of the finisher. This also provides absolute evenness and equal compaction.
Furthermore, there are the following additional technical requirements.
We install gravel-bearing layers using so-called finishers in order to construct a homogeneous construction that lives up to the requirements. The elevation, slope and evenness are defined and observed by the laser control. Sports grounds are usually built with a hipped roof pitch of 0.8% to all directions. This ensures that surface water runs off to surrounding drainage channels.
The gravel is installed with a finisher and subsequently compacted with a tandem roller. As the gravel-bearing layer is the foundation of the elastic layer, precise work is crucial. This is because the requirements for the elastic layer like for example consistent force reduction can only be met if they are installed at constant layer thickness.
This means that the evenness of the ballast bed influences the elastic layer’s quality and therefore the quality of the entire artificial turf system.