? In order to ensure the quality of the silicon pu surface of the sports ground, before the construction of the silicon pu surface, the construction technicians should check and accept the quality of the cement concrete foundation.
? I. Technical Requirements of Silicone Polyurethane Sports Ground Foundation
? 1, the foundation should have a certain strength (building concrete strength above C20) and stability.
? 2, the foundation can't produce cracks or skin explosion, and ballooning, bulging.
? 3. In order to ensure the uniform thickness and good elasticity of the silicon pu surface layer, the flatness error of the foundation surface is within 3m, the straightedge is within 3mm, the slope meets the requirements (there is a certain drainage slope, the general level is ≤8‰, the vertical level is ≤2‰), the surface is smooth, there is no large area of water, and the water is unimpeded, so as to ensure drainage.
? 4. After the completion of the cement concrete foundation, water curing is required for not less than 7 days, and the total curing period is not less than 28 days. During the construction of silicon pu, its surface should be kept clean and dry to ensure sufficient bonding strength between silicon Pu and foundation.
? Second, silicon pu type
? The surface layer of silicon pu in the whole sports ground is mixed polyurethane glue, and the surface layer of tennis court and auxiliary area is sandblasted.
? Third, the performance characteristics of Sipu Stadium
1, a unique double-layer structure, has good shock absorption and resilience, which not only enables athletes to start quickly, but also relieves the impact force in sports. It is safe and comfortable, providing a safe sports ground for athletes and is the first choice material for professional courts.
2. The material takes water as curing agent, and contains no toxic components such as benzene, free isocyanate and aldehyde. And no toxic or heavy metal components are added in the construction process. It is a real environmental protection product, which fully meets the national environmental protection requirements.
This material is colorful, wear-resistant, anti-slip, anti-aging, and is not affected by climatic conditions. It is an all-weather court material, which can be constructed on the surface of asphalt concrete foundation or cement foundation with simple construction and convenient maintenance.
4. The silicon pu court floor has excellent weather resistance, wear resistance, water resistance and adhesion, rich colors, non-slip surface treatment, good elasticity, easy cleaning and maintenance, and easy maintenance and repair.
Fourth, the scope of application
It is suitable for the ground construction of indoor and outdoor basketball courts, tennis courts, volleyball courts, badminton courts, handball courts and table tennis courts. And can also be used for the ground construction of leisure areas, gymnasiums and sports venues.
? Five, silicon PU stadium ground construction steps
? 1, foundation surface treatment
? The quality of foundation largely determines the quality of silicon PU site engineering. Before construction, the site should be cleaned, and the new concrete site needs a curing period of more than 28 days to lay construction materials.
? 2, laying elastic layer
Before the construction of elastic layer, the foundation treatment should be carefully checked and confirmed, and the elastic layer construction can be carried out only after it is confirmed. Add solvent to the silicon PU court material to adjust the consistency, and spread it on the base surface with a flat scraper or a toothed scraper until it reaches the required thickness. Construction under the scorching sun should be avoided. After the elastic layer is dry-laid, the ground flatness should be tested by water accumulation method, and the water accumulation should be leveled before laying the strengthening layer.
? 3, laying steel layer
? Thirdly, after adding solvent to adjust the consistency of silicone PU court material, the elastic surface should be laid several times with a rubber scraper, and the laid surface should be smooth. If sundries or irregularities are mixed in the construction process, the surface construction can only be carried out after finishing and leveling.
? 4, laying wear-resistant surface layer
Mix component A and component B fully and evenly according to the specified proportion, add a small amount of water to adjust the construction consistency, and scrape it on the surface of the strengthening layer for 2 ~ 3 times with a rubber scraper. If the surface needs to be rough, you can add less than 30% special sand for the surface. Firstly, the component A and the special sand are evenly mixed, and then the component B is fully mixed and scraped. (Refer to the practices of various surface courses: table tennis and basketball courts: add 30% special sand for the first game, 15% special sand for the second game, and no special sand for the third game; Tennis court: add 30% special sand and scrape it for 2 ~ 3 times. Badminton and volleyball court: 2 ~ 3 times without special sand scraping. ) surface construction materials must be sufficient, otherwise it will directly affect the use effect and service life. Avoid construction under scorching sun and high surface temperature to ensure the surface effect.
? Step 5 emphasize
Measure and locate according to the standard size, mark the position of the boundary line, stick it on the court with masking paper along both sides of the boundary line, apply it between the masking paper with special marking paint, and tear off the masking paper after the surface is dry.
? 6. Cleaning and maintenance
? After the floor is finished, it needs cleaning. After the floor is cleaned, it will be maintained for no less than 20 days.
Six, the construction matters needing attention
1, materials must be weighed accurately and stirred evenly.
2, in the process of construction, each working procedure can't be soaked in water within 8 hours after construction.
3, indoor venues must ensure good ventilation effect.