Catalogue:
- What is a prefabricated plastic runway
- The type of a prefabricated runway
- Materials for making a prefabricated plastic runway
- How to lay a prefabricated plastic runway
- The application scene of the prefabricated plastic runway
- Advantages of a prefabricated plastic runway
一、 What is a prefabricated plastic runway?
The ast runway is a kind of coil runway produced in the factory, using natural rubber and artificial rubber as the bottom, continuous calendering through mixed mineral filler, stabilizer and color materials, through high temperature sulfur hardening, mechanical embossing, double layer structure synthesis.
This runway has the characteristics of prefabrication, which can be directly transported to the laying site for installation, avoiding the complexity and uncertainty of the site construction. The advantages of the prefabricated runway include good shock absorption, wear resistance, weather resistance, and convenient and quick installation process. In addition, it also has good environmental performance, using natural rubber and synthetic rubber as the main raw materials, to ensure that the source from the source, and the environmental glue used in the construction also ensures a fast and safe and environmentally friendly construction process.
二、 The type of a prefabricated runway
The prefabricated runway occupies an important position in the construction of sports field. They usually have a variety of skid resistance, wear-resistant, shock absorption, insulation and other functions, can provide good impact absorption and energy recovery, to ensure that athletes can enjoy a safe and comfortable running experience in a variety of weather conditions.
There are several types of prefabricated runways, mainly including fully prefabricated runways and semi-prefabricated runways:
The fully prefabricated runway adopts fully prefabricated cushion and surface layer, and the performance is stable after the factory, suitable for the occasions with high requirements for runway performance.
The fully prefabricated runway adopts fully prefabricated cushion and surface layer, and the performance is stable after the factory, suitable for the occasions with high requirements for runway performance.
- The semi-prefabricated runway adopts the combination of precast cushion and cast-in-place surface layer. This type not only has the advantage of uniform performance of fully prefabricated runway, but also has the characteristics of seamless and durable of cast-in-place runway, which is suitable for places with high requirements for runway performance and durability.
三、 Materials for making a prefabricated plastic runway
The prefabricated plastic runway is mainly made of the following key materials:
- Rubber material: usually using natural rubber or synthetic rubber, is the main elastic source of the runway, accounting for a relatively large, such as about 40% -60% of the total material. It has good elasticity and wear resistance, and can withstand long-term use and various climatic conditions.
- Polyurethane material: an important part of the adhesive and surface material used for the runway, accounting for about 20% -30% of the material. It can hold rubber particles, such as materials, firmly together, and form a tough, smooth surface.
- Rubber particles: generally made of waste tires and other rubber products processing, as a filling material, accounting for about 10% -20% of the material. It can increase the cushioning performance and comfort of the runway, while reducing the material costs.
- Pigment: used to give the runway with a variety of colors, to meet the needs of different sites, accounting for a relatively small, usually about 1% -5%. Pigments need to have good weather resistance and fade resistance to ensure the lasting brightness of the runway color.
- Filler: such as calcium carbonate, accounting for about 5% -10% of the material, can improve the physical properties of the material and reduce the cost.
- Stabilizer: accounting for about 1% -3% of the material, used to prevent degradation and aging in the process of processing and use.
- Flame retardants (used in some specially required runways): about 2% -4% of the material to improve runway fire safety.
- Foaming agent: a small amount of addition, accounting for about 1% -2% of the material, in the process of the runway, enhance the buffering performance of the runway and reduce weight.
- Anti-aging agent: accounting for about 1% -3% of the material, which can delay the aging speed of rubber and other materials in the process of use due to oxidation and other reasons, and prolong the service life of the runway.
- Fluer: it may be used in the construction of the runway surface, accounting for about 0.5% -1%. It is used to improve the smoothness of the material and make the runway surface more smooth and smooth.
四、 How to lay the prefabricated plastic running track?
Prefabricated runways are divided into semi-prefabricated and fully prefabricated plastic runways. Their two runways have different construction methods. Let’s have a look at its construction methods:
1. Construction process of semi-prefabricated plastic runway
foundation treatment
Basic acceptance:
First, a comprehensive inspection of the foundation ground to ensure that the foundation has enough strength and stability to withstand the pressure of the plastic runway. Check the slope of the foundation to ensure smooth drainage, and the slope should be generally controlled between 0.5% -1%. Measure the flatness of the foundation ground, the flatness error should be strictly controlled within 3 mm.
Basic grinding:
Use a professional ground grinding machine to polish the foundation ground to remove the floating slurry and uneven parts of the surface. Attention should be paid to the uniformity in the grinding process to ensure that the flatness of the whole foundation ground is consistent.
Clean the polished dust and debris thoroughly to keep the foundation ground clean.
Repair of cracks and potholes:
Carefully check the foundation for cracks and potholes on the ground, and if so, they need to be repaired. For small cracks, special crack repair materials can be used; for large potholes, they need to be cleaned first, and then repair with similar foundation materials, and the repaired surface should be flush with the surrounding foundation. After the repair, it generally takes 24-48 hours for the repair material to dry and cure adequately.
Apply a waterproof primer:
Select the waterproof primer suitable for semi-prefabricated plastic runway and mix it according to the product manual. Apply a primer on the foundation floor evenly using a roll brush or spray gun to ensure that the primer completely covers the foundation and has an even thickness. The amount of primer is about 0.2 kg per square meter, after painting, waiting for the primer to dry fully, generally need 4-6 hours.
Transportation and storage of roll stage:
Transport:
When transporting semi-prefabricated plastic runway coil, attention should be paid to avoid extrusion and damage.
After arriving at the construction site, the coil should be stored in a dry and ventilated place to avoid direct sunlight and rain, and the storage temperature should be between 5℃ -35℃. Before laying, the coil should be removed from the storage site in advance, so that it can adapt to the temperature and humidity of the construction site, and generally need to be placed for more than 24 hours.
Roll cutting:
According to the actual size and shape of the construction site, professional cutting tools are used to accurately cut the coil.
In the process of cutting, attention should be paid to keep the cutting edge neat and straight, and the cutting error should be controlled within 5 mm.
For irregularly shaped sites, multiple cropping and splicing can be used, but ensure a close fit at the splicing site.
Adhesive preparation:
Select the special adhesive matching with the semi-prefabricated plastic runway coil, and mix it according to the proportion of the product instructions.
When mixing the adhesive, stir it evenly to ensure the stability of the adhesive.
The prepared adhesive should be used within the specified time, generally for 2-4 hours.
Roll paste:
Apply the prepared adhesive evenly on the base floor and the back of the roll with a thickness of about 2 mm. When applying the adhesive, pay attention to the use of professional tools to ensure that the thickness of the adhesive is uniform. Then the coil is pasted on the foundation ground according to the predetermined position and direction, and the roller is rolled from the center of the coil to the two sides to eliminate the air between the coil and the foundation, and ensure that the coil and the foundation are firmly bonded.
Splicing joint treatment:
After the tape paste is finished, the stitching joint needs to be processed.
First, the excess adhesive at the joint is cleaned and then filled with a special filling material. The filling material should be filled full and flat, flush with the surface of the coil. The amount of filling material is about 0.05 kg per meter gap. After filling, the filling material should be compacted and trimmed to ensure the quality of the stitching joint.
After-treatment
Rolling pressure compaction:
Roll roll roller roller roller about 500 kg.
Roll to start from one end of the runway, and gradually push towards the other end, to ensure that each part of the uniform pressure.
No less than 3 rolls to ensure that the runway is fully fitted to the foundation and the flatness and compaction of the surface.
Face layer spray gel:
Select the surface rubber spray material suitable for the semi-prefabricated plastic runway, and mix it according to the requirements of the product manual.
Use professional glue spray equipment to spray the glue spray material evenly on the surface of the runway, and the amount of glue spray is about 0.15 kg per square meter.
When spraying, we should pay attention to control the pressure and Angle of the spray gun to ensure that the uniformity and thickness of the spray are consistent.
Setting-out:
According to the standard site requirements, use professional line drawing machine and environmentally friendly line paint. Before drawing the line, the runway surface should be cleaned and measured to determine the position and size of the line. When drawing a line, we should pay attention to the width and accuracy of the line, and the error of the line width should be controlled within 2 mm. After the drawing is finished, it generally takes 24-48 hours to dry and solidify the drawing paint.
2. Construction process of fully prefabricated runway
Foundation treatment
Foundation inspection and dressing:
Conduct a comprehensive inspection of the foundation ground, including flatness, strength, slope and other aspects. The flatness requirement should be within 5 mm. If there is an uneven place in the foundation ground, it needs to be repaired. For the foundation with insufficient strength, reinforcement measures need to be taken, such as laying steel mesh or increasing the thickness of the foundation. Check the basic drainage system to ensure smooth drainage.
Cleaning foundation:
Use broom, hair dryer and other tools to thoroughly clean the foundation floor, remove dust, debris and oil pollution.
For stains that are difficult to clean, professional detergent can be used for cleaning, but pay attention to the choice of detergent to avoid causing damage to the foundation.
The cleaned foundation ground shall be kept dry for the next step of construction.
Rolling cover glue:
Select the high permeable bottom adhesive and make it according to the requirements of the product specification. Use a rolling brush to roll the bottom adhesive evenly on the foundation floor to ensure that the bottom glue completely covers the foundation and the thickness is uniform. The amount of bottom sealing glue is about 0.3 kg per square meter. After rolling and coating, we should wait for the bottom sealing glue to dry fully, which generally needs 6-8 hours.
The laying stage
Runway plate transportation and storage:
The finished plate of the fully prefabricated plastic runway should be careful to prevent collision and damage during transportation. After the plate arrives at the construction site, it should be stored in a flat and dry place to avoid direct sunlight and rain, and the storage temperature should be between 5℃ -35℃. Before laying, the plate should be removed from the storage site in advance to adapt it to the temperature and humidity of the construction site, and generally need to be placed for 12-24 hours.
Plate positioning and splicing:
According to the design drawings and actual dimensions of the site, mark the lines on the foundation ground to determine the laying position of the runway plate. Then the runway plate is laid according to the position of the line, and installed by mechanical and manual way. During the splicing process, ensure the close connection between the plates, and the splicing gap is controlled within 1 mm. Use special connections and glue to reinforce the connections between the plates to ensure the integrity and stability of the runway.
After-treatment
Surface inspection and cleaning:
Make a comprehensive inspection of the surface of the laid runway to see whether there are any problems such as loose plate and uneven splicing. If problems are found, they should be dealt with in time to ensure the quality of the runway. Use broom, hair dryer and other tools to clean the runway surface, remove the dust and debris on the surface.
Grinding treatment:
Use professional grinding equipment to slightly polish the splicing parts and edges of the runway. When grinding, attention should be paid to control the depth and strength of grinding to ensure that the surface is smooth and smooth, and the grinding depth does not exceed 0.5 mm. The dust after grinding should be cleaned up in time.
Setting-out:
According to the standard site requirements, the use of professional line drawing machine and environmental protection line paint. Before the runway surface should be cleaned and measured to determine the position and size of the line. When drawing a line, we should pay attention to the width and accuracy of the line, and the error of the line width should be controlled within 2 mm. After the drawing is finished, it generally takes 24-48 hours to dry and solidify the drawing paint.
After the completion of the marking, it is necessary to carry out a comprehensive quality inspection and acceptance, and also regular inspection and maintenance of the plastic track to keep clean and maintain its good performance.
五、 Application scenarios of prefabricated plastic runway
Due to the different characteristics of the semi-prefabricated and fully prefabricated plastic runways, there are also different application scenarios:
Semi-prefabricated plastic runway:
- School playground: including all kinds of playgrounds in primary and secondary schools. The semi-prefabricated plastic track can provide a comfortable sports environment for students, and its good elasticity can reduce the impact of students during sports and reduce the risk of injury; the moderate hardness can meet different sports needs, such as running, long jump, skipping and other daily sports activities. For example, some ordinary primary and secondary schools, when considering the construction of plastic runway, semi-prefabricated plastic runway because of high cost performance, excellent performance, become a more suitable choice.
- Sports venues: can be used for small stadiums, such as community stadiums, internal gymnasium, etc. In these venues, the semi-prefabricated plastic running track can not only meet the requirements of certain professional sports, but also have a better control in the cost. The construction is relatively simple, which has little impact on the construction period of the venue, and the subsequent maintenance cost is relatively low, which can meet the needs of the daily use and management of the stadium.
- Fitness trail: it is also suitable for the construction of fitness trail in parks, communities and other places. When people walk, jog and other activities on the fitness trail, the elasticity and comfort of the semi-prefabricated plastic running track can improve the exercise experience, and it has good anti-skid performance, which can effectively guarantee the safety of athletes. Like the fitness areas in some city parks, semi-prefabricated plastic runways are used to provide quality fitness venues for the public
Fully prefabricated plastic runway:
- Professional sports event venue: it is the preferred track type for large professional sports events, such as the Olympic Games, world championships and other international top track and field events. The fully prefabricated plastic track has excellent performance, can provide the best competition conditions for athletes, its high precision flatness, uniform elasticity and excellent anti-skid performance, help athletes to play the best level and create excellent results. For example, the world famous stadiums, its track is mostly fully prefabricated plastic track.
- High-end sports training base: the training of professional athletes has extremely high requirements on the track, and the fully prefabricated plastic track can meet their needs of high intensity and high frequency training. The performance of this track is stable, long time use and not easy to appear deformation, wear and other problems, can ensure the quality and effect of training, is conducive to the systematic and scientific training of athletes.
- Large comprehensive sports center: Large comprehensive sports center usually hold a variety of sports events and activities, need to be equipped with high quality track. The overall quality and performance advantages of the fully prefabricated plastic track are obvious, which can meet the needs of various large-scale sports activities, and its beauty is high, which matches the high-end positioning of the sports center, and improves the overall image of the sports center
六、Advantages of prefabricated plastic runway
Semi-prefabricated runway and fully prefabricated runway have different advantages, let’s understand it respectively:
Physical features and reasons of the semi-prefabricated plastic runway:
Characteristic one: good elasticity
Reason: elastic materials such as rubber particles are combined with specific processes to make elastic layer, which can effectively buffer the impact force during movement, not only protect the joints of the athletes, but also provide a comfortable movement feeling. For example, in the school physical education teaching, when students do a variety of running and jumping sports, good elasticity can reduce the potential harm to frequent exercise, especially for students in the growth and development stage, can reduce the risk of sports injury, is conducive to their active participation in physical activities.
Feature two: moderate friction force
Reason: The surface is specially treated, with the right roughness and texture. In daily use, whether running, emergency stop or turning, can provide a steady grip. For example, in community sports places, when residents exercise, moderate friction can ensure their sports safety, and avoid accidents such as slip and fall. At the same time, this will not produce too much obstacle to the movement speed, to meet the movement needs of different groups of people.
Feature three: wear resistance
Reason: choose high quality wear-resistant materials and through careful process processing. In the face of a large number of personnel frequently use and the friction of various devices, can maintain a good state for a long time. Take the school playground as an example, every day there are many students on a variety of sports activities, wear resistance makes the track will not easily wear, peeling and other phenomena, reduce the maintenance cost and frequency in the later period, to ensure the long-term use value of the track.
Feature four: strong temperature adaptability
Rationale: The properties of the material allow it to remain relatively stable at different temperatures. In hot summer, will not be soft due to high temperature, can still provide reliable sports surface; in cold winter, will not become brittle crack due to low temperature, to ensure normal use all year round. This is very suitable for site construction in all climatic conditions, whether in the hot areas in the south or in the cold areas in the north.
Physical characteristics and reasons of fully prefabricated plastic runway:
Feature one: uniform elasticity
Reason: Through advanced production technology and the use of high quality materials, ensure the elasticity of the whole runway. For professional athletes, this is crucial in training and competition. For example, in sprint events, athletes get the same elastic feedback at each step across the track, which helps them to maintain a steady rhythm and speed and play to the best level. In the professional sports training base, this uniform elasticity can ensure that the athletes can get a consistent training experience in the long-term training, and improve the training effect.
Characteristic two: excellent anti-skid performance
Reason: Use special anti-slip particles and surface treatment technology to provide excellent anti-skid effects in a variety of environments. In professional sports events, when athletes run at high speed and fierce competition, the excellent slip performance can greatly reduce the risk of slip and injury and ensure the safety of the competition. Even in wet or rain conditions, it can ensure the safety of the athletes without affecting the quality of the competition.
Feature three: extremely high wear resistance
Reason: choose high quality wear-resistant materials and precision manufacturing process, so that it can withstand high strength use and frequent friction. In the professional sports venues and training bases, faced with a large number of professional athletes’ high intensity training and frequent competition, high wear resistance can ensure that the track maintains a good surface state and performance for a long time, without frequent replacement and maintenance, saving cost and time, but also ensuring the sustainable availability of the site.
Feature four: accurate dimensional stability
Reason: Strict production quality control gives it a very high dimensional stability. In professional track and field competitions, the size accuracy of the track is extremely high, and any small deformation may affect the fairness of the race and the accuracy of the results. The precise size and stability of the fully prefabricated plastic track can ensure that the race is carried out in a fair and accurate environment, and meets the international competition standards and professional training requirements. At the same time, it can also ensure that the runway will not be deformed due to various factors in the long-term use process, to maintain its professionalism and reliability.
Through understanding so much content, we probably have a certain end to the prefabricated plastic runway!
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