In general, the standard distance of a circle of university playground runway is 400 meters. The university playground track is a relatively standard track. Generally, the north and south sides are semi-circular tracks, and the east and west sides are straight tracks, which are divided into eight tracks. The innermost ring is 400 meters long. Other tracks have pre-departure positions for short-distance races, and long-distance races will use the same starting line in the form of collective departure. There is a 100 meter straight runway on the west side of the runway.
What is the material of the playground runway?
1, compound runway
The material of this track is relatively simple, and the lower layer is generally rubber particles made of polyurethane resin. The surface layer is usually colored EPDM, which has the advantages of ultraviolet resistance, wear resistance and good elasticity, and can avoid sports injuries. Generally used in primary and secondary schools or kindergartens.
2. Breathable runway
This track has a complicated structure and belongs to a double-layer polyurethane spraying track. The lower layer is generally rubber particles made of polyurethane resin, and the surface layer is generally a mixture of colored EPDM and polyurethane, and then it is formed by mechanical spraying. Its advantages are good air permeability and water permeability and relatively cheap price, so it is favored and welcomed by all schools.
3. Mixed runway
The material of this kind of crawler is complicated, which is composed of PU and black rubber particles. Its advantages are wear resistance and good elasticity, which can avoid sports injuries, but it is expensive. Generally used in specialized stadiums and universities.
4. Prefabricated runway
It is the most advanced of these tracks and belongs to prefabricated coil track. Its main raw materials are natural rubber and artificial rubber, then mineral fillers, stabilizers and pigments are added for calendering, and then vulcanized and hardened at a high temperature of 280-300℃.
Its advantages are that the bending degree can be changed at will, good elasticity, strong impact resistance, strong friction and good waterproof performance, and no water will remain on the surface in any weather and rain.