When developing the PowerGrass hybrid grass system we had to compare ourselves with all other existing hybrid grass systems because they were patented but also because we wanted to develop an innovative system that was ideal for professionals but accessible to everyone.
Along the way, we understood the merits but also all the limitations of the existing systems which were, as always, the starting point for further research.
In order to create a good hybrid grass system, it is not enough to use an artificial turf that allows the roots to penetrate. We have often observed that depending on the type of reinforced turf system used, the mere presence of artificial turf as well as the presence of the artificial turf can make the playing surface much more rigid for the game and therefore the demand for the use of Verti-Drain type hole punches to break up the ground increases.
Cork grains to make the substrate soft
It is worth remembering that in stadiums, river sand is very often used almost entirely in the growth medium to increase the infiltration rate of rainwater and minimise the risk of interrupting matches in the event of heavy rainfall.
However, the sand layer tends to 'cement' due to constipation and limestone in the water and fertilisers used to maintain the natural grass. Considering that the infiltration of water into a substrate of about 15 cm of pure sand in accordance with USGA standards is about 11 mm/min equal to 660 mm/hour, it is understandable that once the substrate has been spread, compacted and covered with turf, which is further compacted by the players, it becomes hard to grow and its permeability decreases below the standard limits of 360 mm/hour, so very often there is also surface water flow, which is unable to penetrate the turf and the first layer of sand.
In fact, the maintenance staff of these fields often drill holes 1-2 times a month with Verti-Drain to loosen the soil and restore the permeability of the sand layer.
These problems can now be overcome by mixing gentle cork with the vegetal sand layer.
The use of cork is well known as a component of the performance infill for synthetic turf and has also been used as a sand substrate conditioner in the construction of golf greens in Germany. In fact, by applying it in the innovative PowerGrass hybrid system, cork is an essential element that has raised the quality bar significantly.
Cork and sand granules
In our tests, a substrate mixed with cork, coconut and USGA sand recorded a water infiltration rate of 18.63 mm/min compared with 9.88 mm/min recorded with the same sand mixed with peat, which corresponds to a standard mixture of a USGA-compliant growing medium, which is why integrating cork into the sand substrate also significantly increases water drainage.
Another advantage is the elasticity of the cork, which remains unchanged over time. Fine cork, normally used for quality corks, with a fine grain size of 0.5-1.2 mm, very similar to the grain size of USGA sand (ø 0.25-1.00 mm - min 60% in this range) is mixed into the sand.
This characteristic offers two advantages:
which give the growth substrate characteristics of the type:
Available: 50,46 Gb ( 36,1%)
Disk <c>: Total size: 139,66 Gb
Available: 66,16 Gb ( 66,2%)
Disk <e>: Total size: 100,00 Gb
* All fields are required!
Le richieste compilate correttamente sarannno evase con la massima priorità.
POWERgrass hybrid turf field
Synthetic turf field