What is the national standard for plastic runways? Do we all have to follow this standard?
(1) Standards
1. The standard runway is 400 meters in length and should be composed of two parallel straights and two curves with equal radii. Except for grass runways, the inside of the runway shall be demarcated by a raised edge made of suitable material. The rim is about 5 cm high and at least 5 cm wide. ?
2. The length of the runway should be measured 30 cm outside the outer edge of the inner edge of the runway. If there is no protruding edge, the measurement should be made 20 cm outside the outer edge of the marking line.
3. In all track events of 400 meters and below, each athlete should occupy a lane. The minimum lane width is 1.22 meters and the maximum lane width is 1.25 meters. The lane line width is 5 centimeters. All lane widths are should be the same.
4. Plastic runway construction is based on asphalt or cement, and the basic methods are roughly the same as road construction. The flatness of the foundation surface is required to ensure consistent thickness and uniform elasticity of the plastic surface layer. The quality requirements for the foundation are as follows:
5. Slope: transverse <1% (8‰ for curves and 5‰ for straight roads) , semicircular area 5‰), longitudinal direction <1‰, high jump area <0.4%, the surface should be flat and smooth, and the drainage should be smooth.
6. Flatness: The flatness qualification rate is above 95%, and the 3-meter ruler error is 3mm.
7. Positioning: For accurate construction and line drawing needs, firm and distinct markers should be used to mark the four semicircle tangent points and two circle centers of the runway site.
8. Drainage: The drainage system must discharge accumulated water two hours after heavy rain. In frozen areas, it is best to add a geotextile buffer layer between the asphalt layer and the gravel layer. The foundation along the drainage trench should be treated with special waterproofing.
9. Strength and stability: The foundation should have a certain degree of strength and stability, the surface should be uniform and solid, without cracks or rotten edges, and the joints should be straight and smooth. The cushion layer is compacted, with a density greater than 95%. After being crushed by a medium-sized roller compactor, there are no obvious wheel marks, loose soil, waves, etc.
(2) Introduction to the types of plastic track materials:
1. Breathable plastic track
Special breathable structure: no bubbling, the bottom layer is It uses single-liquid PU glue from the American APT company combined with elastic rubber particles, which has breathable function. At high temperatures, the vapor generated by the foundation will quickly dissipate through the ventilation holes. The vapor pressure cannot accumulate, so there will be no bubbling phenomenon, which is especially the best choice in humid and rainy areas.
The breathable plastic track has:
Weather resistance: excellent weather resistance, not easy to age, and will not bubble due to weather effects.
Anti-ultraviolet radiation: The surface layer is made of colored EPDM rubber particles, which makes it highly resistant to ultraviolet rays, so that the track has no worries about fading.
Environmentally friendly: Different from traditional runways, it is non-toxic and odorless even under the scorching sun, which is beneficial to the maintenance of the surrounding environment and good for your health.
2. Composite plastic track
Weather resistance: The surface rubber particles adopt an embedded structure to ensure that the track system has excellent weather resistance and resistance to damage caused by spikes.
Flatness: Using professional self-branching machinery for construction, the surface has no gaps and is smoother.
Ultraviolet resistance: EPDM colloidal particles and polyurethane glue are used as materials.
Anti-ultraviolet radiation: The surface layer is made of colored EPDM rubber particles, which makes it highly resistant to ultraviolet rays, so that the track has no worries about fading.
Environmentally friendly: Different from traditional runways, it is non-toxic and odorless even under the scorching sun, which is beneficial to the maintenance of the surrounding environment and good for your health.
3. Prefabricated plastic track
Professional: Combining sports science and material science, using factory prefabrication technology, it can fully meet and reflect the professional requirements of athletes and participants for the track, and comprehensively Passed the physical and chemical performance index testing of track and field track by the International Association of Athletics Federations (IAAF).
Safety: The unique surface ridges and bottom concave nest design provide a suitable impact absorption and energy return system, which effectively improves sports performance while ensuring sports safety.
Environmental protection: Toxic and harmful substances are abandoned in the materials, truly considering the physical and mental health of sports participants; the long quality guarantee and renovable design extend the service life of the product and save the earth's resources. ; As a manufacturer, we guarantee recycling and resource reuse after the expiration of its useful life.
Excellent weather resistance: Under normal climate conditions, it has good acid rain resistance, alkali resistance, UV resistance, and anti-fungal properties. It can also meet the anti-slip properties required for professional competitions under humid conditions, even if It also has excellent sports performance under harsh climate conditions (such as low temperature, plateau climate, high UV areas, etc.).
Economical and durable: The high cost performance can bring maximum return on the investment in sports venues. The solid and sturdy structure ensures the high-frequency use of the product in track and field fields of large, middle and primary schools.
Multi-color effect: The non-dazzling multi-color combination adds to the beauty of the sports field and brings a pleasant physical and mental experience to the sports field participants.
Maintenance-free: There is no degranulation and chipping, and it has certain self-cleaning properties. The markings are always new and only need daily cleaning, no professional maintenance is required.
4. Hybrid plastic track
It is a track system formed by mixing PU and black rubber particles in a certain proportion. The materials are transported to the site and mixed in a certain proportion, a catalyst is added, stirred evenly, spread, and vulcanized at room temperature. This surface layer is currently the only plastic surface layer material with national standards and is mainly used in professional competition venues.
Extended information:
Plastic track, also known as all-weather track and field sports track, is composed of polyurethane prepolymer, mixed polyether, waste tire rubber, EPDM rubber particles or PU particles, pigments, and auxiliary materials. Composed of agents and fillers. The plastic track has the characteristics of good flatness, high compressive strength, appropriate hardness and elasticity, and stable physical properties, which is conducive to athletes' speed and technology, effectively improves sports performance and reduces the fall injury rate. Plastic track is composed of polyurethane rubber and other materials. It has certain elasticity and color, and has certain UV resistance and aging resistance. It is internationally recognized as the best all-weather outdoor sports ground material.
Reference material: Plastic runway_Baidu Encyclopedia?