Plastic track classification introduction:
Generally speaking, the runway is commonly referred to as track and field track in various types of schools and professional stadiums. There are standard runways and non-standard points. The standard runway is 400 meters in circumference and 36.5 meters in radius. (In addition, There are 36 meters and 37.898 meters two kinds), non-standard runway refers to according to the playground land area shape and size, appropriately adjusts the playground radius and the perimeter, common has the perimeter 200 meters, 300 meters and so on.
The plastic runway can be divided into:
Prefabricated plastic runways, all-plastic plastic runways, hybrid plastic runways, composite plastic runways, breathable plastic runways, and EPDM plastic runways.
Prefabricated plastic runways and all-plastic plastic runways are common types of professional track and field stadiums due to their unmatched excellent performance, but their high prices are unbearable for ordinary schools, middle schools and elementary schools.
The performance of hybrid plastic runway and composite plastic runway is between plastic and breathable, and the price is slightly lower than that of plastic track such as full plastic type, but it is also a lot higher than that of breathable type, and the basic requirements are higher;
The performance of the breathable plastic runway can fully meet the GB/14833-93 indicators, and it is breathable and permeable, the construction period is short, maintenance and renovation are also easier, the most cost-effective, but also the first choice for large schools.
The EPDM plastic track is mainly used for non-standard runways such as elementary schools or kindergartens.
Various plastic runway construction requirements and methods
1, mixed particle plastic runway
First, the cement foundation must be treated with water or the asphalt base should be back-covered. After the foundation layer is processed and maintained for 24 hours, the bottom layer of the track can be paved, and a 25% particle size 3-4mm high-elasticity black rubber particles can be mixed with the runway substrate according to the national standard, and pour uniformly into the site, scraping and scraping, laying a thickness of 9mm. Curing maintenance 24 hours. Pour 2mm thick layer of runway surface material, scrape and scrape, spread evenly 3-5mm EPDM anti-skid granules throughout the entire field, sweep away unfastened EPDM granules after 24 hours, then roll or spray a layer of runway special finish .
Super nail resistance, suitable for a variety of venues, easy maintenance, economical, can absorb strong impact, anti-aging, bright colors. Paving is best based on asphalt.
2, printing non-slip plastic runway
First, the cement foundation must be treated with water or the asphalt base should be back-covered. After the foundation layer is processed and maintained for 24 hours, the bottom layer of the track can be paved, and a 25% particle size of 3-4mm high-elasticity black rubber particles can be mixed with the plastic substrate according to the national standard. Stir uniformly and pour into the site, scraping and scraping, laying a thickness of 10mm. Curing maintenance 24 hours. The whole site poured 2.5mm thick printed runway surface material, scraped and scraped, covered with a printing mold on the material, set off the printing mold after 24 hours, you can see 2-3mm thick printing surface layer.
Special pattern design, wear-resistant anti-slip, one-piece surface layer, uniform thickness, no particles, no bubbling, anti-aging, colorful, the best paving on the basis of asphalt.
3, breathable particle plastic runway
Check the flatness of the foundation, use 3m Ruler to measure the flatness within 3mm, the entire site is flat and the site drainage gradient meets the requirements. Use 3-4mm high-elasticity black rubber particles mixed with high-strength one-component glue, pour into the spreader uniformly, lay the thickness of 10mm, curing and maintenance for 24 hours. Use air-permeable surface material mixed with equal-sized 1-2mm EPDM particles and appropriate amount of diluent to mix well. Pour into the sprayer and spray the gun at 60 degrees to spray in the same direction. Wait 24 hours for spraying, and spray again in the opposite direction. , maintenance 48 hours before use.
All-weather use, environmental protection, no pollution, no fading, no particles, water permeability, ventilation, mechanical construction, excellent flatness. Pavement is best on the basis of reinforced concrete.
4, composite particle plastic runway
Check the flatness of the foundation, measure the flatness with a 3m ruler within 3mm, and make the entire site flat. Use 3-4mm high-elasticity black colloidal particles mixed with high-strength one-component glue, pour into the spreader evenly, lay the thickness of 9mm, cure and maintain for 24 hours. Use 30% black rubber powder or talc powder to cover the bottom layer of black rubber, maintain 24 hours on the back cover, pour in 2mm thick layer of track surface material, scrape and level off, spread evenly 3-5mm EPDM anti-skid particles After 24 hours, clean out the non-stick EPDM particles and then roll or spray a layer of runway-specific topcoat.
Anti-ultraviolet radiation, effectively avoid sports injuries, has a strong elastic layer and buffer layer, anti-spike shoes wear, moderate hardness, good wear resistance. Pavement is best on the basis of reinforced concrete.
Some issues that need attention in plastic runways:
1. During the construction process of polyurethane plastic materials, it is most afraid that water and glue will encounter a drop of water droplets before the initial solidification, which will produce a large bubble. Therefore, the construction personnel should prepare the towels to wipe the sweat under the high temperature conditions. It is important to be aware of the weather conditions and to make emergency measures to prevent sudden showers. The time for the plastic shop to avoid the morning atmosphere and the ground when the humidity is high, even in the normal weather on a clear day, it is generally best to form a formal laying of the plastic runway after nine in the morning.
2, to prevent the occurrence of foaming and shelling after the plastic surface piling, the density of the grassroots layer must be strictly controlled to prevent the impermeability of the bituminous base layer itself, shelling delamination, resulting in poor adhesion, surface gasification, plastic surface Was pulled off. Where the density of the grass roots is not enough, drill bits can be used to drill holes and glue can be used for reinforcement.
3. The actual paving thickness of the plastic surface refers to the center from the rubber bottom to the surface rubber particles, and generally it is controlled from two aspects. First of all, a preliminary inspection of the thickness dimension is carried out by means of a vertical mold, and the cutting or hammering of the local high part of the base layer is performed. If there is not much, the thickness can be ensured by adding clips to the squeegee on the flat-scratcher ruler. The thickness of the main racetrack of the 11th Asian Games northern suburbs competition venue is to ensure the thickness, and the error control is positive, so the average thickness is 14MM or more.
4, in order to ensure the flatness, slope, mold nails after the good, with a level instrument for simulation correction, the grassroots individual high places, first leveling, individual low places, filled with plastic.
5. The base part of the pollution and corrosion of diesel is firmly cut out and filled with plastic.
6. The construction experience of the plastic runway after the rain is not accumulated water: (1) In order to ensure the flatness, the laying span is as large as possible, the main runway span is 3.66 meters, and the non-race zone span is more than 4 meters. (2) There is always a phenomenon of partial water accumulation after a semi-circular rain in the north and south, especially in semi-circular areas of high jump. To ensure the slope, it is best to use "turtle back" construction method to facilitate drainage.
Related Reading:
"Six Course Materials and Plastic Track Courses"
Http://
Office Supplies Wholesale, Office Supplies Set, Office Stationers
JNY International Trade Co., Ltd , http://www.jny-stationery.com