synthetic grass is a non-life plastic chemical fiber products as raw material, the use of artificial methods produced intend lawn. It is the solution to the use of high intensity, extremely adverse growing conditions difficult to grow natural grass is not suitable planting lawn an important way. Compared to natural grass, synthetic grass has a very distinct advantages and disadvantages. Such as weather, rain, snow, weather impact; maintenance simple, low maintenance costs; recyclable material environmental protection, surface layer, is irreplaceable natural turf, synthetic grass is very applicable to the frequency of use than high primary and secondary school playground or training ground. However, due to the artificial turf used in chemical fiber materials, asphalt or concrete as a grass-roots, surface hardness, buffer performance is poor, can easily lead to the athletes ankle and knee injuries; surface temperature variations, especially In the summer, the highest temperature up to 52 ° C, such a high temperature caused a great impact on the competitive state of the athletes and the environment will be.
comparative analysis of characteristics of synthetic grass and natural grass
2.1 turf players feature requires
1), shock-absorbing properties: natural turf requires between 50% -70%, artificial lawn requires between 55% -70%.
2) deformation performance: for natural grass, soaking the muddy turf deformation very dry turf is little or no deformation;
Artificial turf, the degree of deformation is between 1-7 mm.
3) non-slip performance: natural turf requires 0.6-1.0 0.6-1.0 synthetic grass requires.
4). Resistance: the natural turf resistance value of 25-50 Nm; artificial turf resistance values of 35-45 Nm.
5). Gliding distance: natural turf glide distance of 0.20-0.55 m; synthetic grass gliding distance of 0.25-0.45 m.
2.2 turf ball
1) vertical jump height: between 25% -45% of the values of natural turf; artificial lawn values in the range of 30% -42%.
2). Scrolling speed of the ball: the value of natural turf four meters -10 meters; the synthetic grass numerical 4 meters -10 meters.
3) different ball bounce angle: 25 degree corner, the pop-up speed of 50 km / h, the height of 60% to 80%.
2.3 field test
1) slope <1.0%.
2) within 3 meters the flatness (macro) of less than 10 mm.
3). Flatness of less than 300 mm 2 mm.
4). The foundation permeability is greater than 180 mm / h.
