Construction process of spraying mixed plastic runway

The hybrid plastic track material adopts the hybrid structure approved by IAAF. The surface layer is PU particles or EPDM weather-resistant environmental protection color particles, and the mother body is a full PU blended rubber particle. The construction process is simple and conforms to international competition standards. The standard thickness is 13mm.

Production Process:

1 The material adopts a low-temperature polymerization reaction, and thus its iso-hydrogen acid value is more stable (a main parameter of the quality of the pre-polymer).

The two-color slurry and the second component are mixed and the grinding process is changed to a traditional high-viscosity sand mill, and a high-speed shear emulsification dehydration reactor combined with a three-roll mill is used. The particle size of the material has been reduced from 60-80μ to 20-30μ in the conventional process. The mixing is more uniform and the dewatering is more complete. Therefore, the main performance indicators of the product are higher than the technical standards of the International Association of Athletics Associations and the National Athletic Association.

3 The use of new formulas has eliminated TDI and lead-containing catalysts and special processes, prolonged the reaction time, and the residual toxicity of hazardous substances has been greatly reduced compared with other similar products. Even in the hot sun, it is odorless and it is a truly environmentally friendly product.

Features:

1 super weathering performance. In the formulation process, the unique ANTISUN anti-ultraviolet light aging factor and ATTACKFUNGUS super anti-mold factor are used to replace traditional UV absorbers and anti-mold agents, thus making this product has superior anti-aging, anti-mold and anti-bacterial dual protection, and the surface EPDM particles also have far better anti-aging physical properties than ordinary polyester particles.

2 super adhesion properties. The unique moisture-proof and thickening coating formula technology is adopted, and because the emulsion molecules have a special reactive network structure and permeability, the combination with the foundation is more solid, and the technical problem of easy laminar foaming that occurs in the traditional formulation process is solved.

3 super fade resistance. Due to the presence of TDI in traditional paving materials, its free TDI combines with air to oxidize and fade to fading. This product replaces TDI with MDI and unique anti-UV aging factor of ANTISUN, so its color durability is stronger.

4 unique environmental performance. Due to adopting a unique formula process, it is the first to break through the difficulties of MDI one-component polyurethane paving technology in China, replacing traditional TDI and lead-containing catalysts, and using plants to extract ANTISUN anti-ultraviolet aging factor and ATTACKFUNGS super anti-mold factor to replace synthetic ultraviolet rays. Absorbents and antioxidants, anti-mold agents and surface-skid particles are environmentally friendly products and their unique environmental performance can be modeled.

Construction preparation:

(1) It is necessary to obtain the formalities for the construction unit to cooperate with the construction permit in a timely manner.

(2) According to the general layout of the construction, set up temporary facilities and workers temporary dormitories. And arrange the construction equipment and material stacking site.

(3) Establish temporary power supply and water supply systems according to the audited and approved temporary power and water layout drawings. After the system is laid, the system shall be checked and accepted according to the formalities and filed for investigation.

(4) Organize construction materials, implements, and labor organization in place.

Prior to the commencement of the work, a material entry plan will be formulated. The materials specified in the special materials and design will be implemented as soon as possible and will be promptly organized for entry into the market. In addition, raw material inspections and mortar and mortar trials will be conducted in advance. Rebar processing plans should also be issued early, and the supply of formwork tops should be sufficient to meet the construction progress requirements.

(5) Organize personnel to carry out safety production education and technical disclosure. Each department formulates work plans and operating rules to ensure that all preparatory work before the commencement of work is ready.

Construction plan for plastic playgrounds:

Polyurethane plastic (PU) mixed surface layer

1, polyurethane plastic (PU) elastic layer:

(1) Material: Plastic track elastomer is composed of Group A and Group B. The composition of Group A is mainly imported raw materials.

Synthetic polyurethane raw materials, B composition is divided into vulcanizing agent, imported pigment and a variety of additives.

(2) Construction preparation:

1 Stir place should be covered with a layer of plastic strips to ensure the ground is clean.

2 When the material is activated, the cover must be cleaned first.

(3) Construction process:

1 The plastic seal bottom layer: pour material into the mixer should be first poured into a group (clear liquid), and then poured into group B (color liquid), stirring the mixer should be forward and reverse each other, mixing time is 2 minutes, so that the material is fully stirred, will Stir the urethane material on the site to scrape and spread a layer of 2-4 mm black particles. After 24 hours, the non-bonded black particles were cleaned.

2 plastic bottom layer: pour material into the mixer should first fall group A (clear liquid), and then inverted B group (color liquid), stirring mixer should be forward and reverse each other, stirring time is 2 minutes, so that the material is fully stirred, then press 20% proportion blending 2-3mm black granules, using a special tool according to the construction requirements thickness (thickness 9mm) will leveling the mixture, local manual leveling, after the second day of construction curing after cleaning edges, edges to be leveled After laying, the site should be leveled, such as local unevenness, leveling with glue.

3 Plastic surface: Stir the runway fabric and EPDM particles. After mixing and proportioning materials are transported to the spraying site, the sprayer will start spraying. Spraying should pay attention to two points: one is to detect the thickness at any time, only positive difference is allowed and negative difference is not allowed, and the other is to adjust according to temperature change at any time. The proportion of catalyst is to prevent the mortar from being too thick. Thirdly, the paving time should be set as soon as possible after 4 PM or before 10 AM to prevent the temperature from being too high, which will cause foaming in the solidification process and affect the quality of the raw material. The surface coating material is a spray-type face glue, a particle size of 2-3mm EPDM rubber particles, and a rubber powder. After mixing evenly according to the proportion, a professional 2-3 sprayer is used to spray the 2-3 mm thick surface layer in both the forward and reverse directions on the substrate surface. After 24 hours of maintenance can be crossed.

(4) Process characteristics: Our company adopts the “layered construction method”. Although this type of construction method has many processes, the cost will increase, but it has the following advantages:

1 Because the stratified construction method is characterized by stratification, the asphalt base pores have been sealed during the first paving of the base material, and the second time when the ground is paved for the second time, the flatness is better. More uniform thickness.

The 2-ply paving was performed by spraying EPDM granules with high-quality face glue to increase the bond strength of the EPDM granules.

2, underlined part

(1) Material: Polyurethane line white paint.

Material characteristics: wear-resistant, no discoloration, strong adhesion.

(2) With the identified steel ruler, the theodolite sets up the bit line, and the data of each point refer to the requirements of sports technology. The relative error of the internal control index is ±0-±1/10000.

(3) According to the point line and the color paint, the lane width is 5cm. The lanes to the right (ie outside) of the lanes are included in the runway.

Mark line marking precautions:

1 The cleaning of the site before the spray line should be thorough, and the recovery of floating particles should be kept clean to prevent the occurrence of defects due to segregation. When there is wind, no line can be sprayed to prevent imaginary edges due to wind effects.

2 After the line is crossed, the sports technician shall review the angle, and the angle part shall be checked with the length of the radiation. The linear part shall be checked with the identified steel ruler (including the ruler length correction and temperature correction), and the conformity shall be confirmed before it can be stipulated by the IAAF. Colorful sign spray paint.

Because the thickness of the surface layer is 2.5-2.8mm, it is all-plastic polyester and does not contain black rubber particles. Although it has high cost, it is of good quality and is more wear-resistant. At the same time, it overcomes the leakage of traditional one-time paving seepage paste due to the absence of black rubber particles. Black disease.

Because the layered construction method has secondary leveling opportunities and is easy to control, it can be constructed in a large area. Therefore, after the completion of the construction, except for the red-green boundary and the two or four straight points at the boundary, the entire site is flat and beautiful.

The company's stratified construction anti-threshing construction process, after the completion of the road surface dull, different from other companies, particle slurry mixing and spray anchor anti-off process, or sprayed after the grain spray coating technology, after the completion of the road surface luster After the spiked shoes were used, especially the first running line, there were noticeable impressions and nail holes (holes). Since there is one more process for delamination, that is, one more quality inspection procedure, the quality risk can be eliminated before the next process. Therefore, after the completion of the product, the company basically eliminates the repair of scars.

3、Completion acceptance

(1) After the construction of the runway plastic surface pavement has been completed, draw an as-built drawing.

(2) Organize the construction operation records and write the construction summary.

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