Silicon PU badminton court performance characteristics:
I. professionalism:
The performance of upper and lower shells is a professional structure designed for healthy exercise. One of the important purposes of the construction of the stadium is to provide professional, safe and healthy competitive conditions for sports, so that the hard ground can bring professional sports texture; while the flexible sports ground can effectively increase the sports buffer and reduce the reaction of athletes'ankles, joints and ligaments to the ground. The injury caused by force is also effective in reducing sports injuries caused by falls and falls in sports. A professional sports structure with a bullet but not soft.
Two, environmental protection
Implementation of indoor decoration and decoration materials harmful substances limit national standard: GB18581
1, single component silicone modified polyurethane, water absorption curing, no residual harmful chemical components.
2, the surface layer is synthetic resin, waterborne material, recognized environmental protection material.
Silicone PU has been recognized as a healthy professional flexible course material in the market. It depends on taking the hygienic and environmental protection performance of the material into full consideration in the research and development. Taking the National Limit of Hazardous Substances for Interior Decoration and Decoration Material (GB18581) as the test standard, the elastic layer and the strengthening layer are monolithic silicone modified polyurethane, which can absorb water and solidify. No harmful chemicals will be left. The surface is waterborne material and is generally recognized as hygienic and environmental friendly. Through the sampling inspection by the National Building Material Testing Center, the complete set of silicon PU materials fully meet the national indoor decoration and fitment materials harmful substance limit standards, and through the certification of China's environmental label products issued by the National Ministry of Environmental Protection Certification Center (Type I), that is, the 10th ring I label, into the government's green procurement list.
Three, practicality
Superior weatherability
Silicon PU will not fade, harden and soften due to the change of outdoor high and low temperature climate. It can keep its bright color even under strong ultraviolet, ozone, rainwater and high temperature difference.
Super abrasion resistance
Silicon PU's original water-based surface layer can ensure that the appearance and structure characteristics are stable and unchanged, and the wear resistance meets the needs of long-term high frequency use.
Excellent dirt resistance
Silicon PU surface is tough and dense, and it is not easy to be scratched by soles or other hard objects. It can keep the course clean and fresh for a long time by simple rinsing.
Construction technology of silicon PU Stadium
1. Foundation treatment
New cement concrete foundation
1.1 grinding seam
The width of the base surface on both sides of the temperature seam is 40-50 mm and the depth of the inclined seam is 3 mm, so that the surface of the temperature seam becomes "V" (each 40-50 width is to increase the bonding area between the sealant and the base and increase its bonding force. The depth of 3 mm is to ensure the thickness of the sealant without occupying the position of the elastic layer, to ensure the overall cushioning property, and to make the thermal expansion and cold contraction of the base not to be reduced. Ring silicon PU surface).
1.2 pickling
Wet the foundation with clean water (prevent dilute hydrochloric acid from infiltrating into the foundation), sprinkle the dilute hydrochloric acid with the concentration of 8% left evenly and wash the base surface, then rinse it with clean water (usually twice). After washing and drying, the cement primary color of the base surface is required, and there is no white powder and floating matter. In the pickling process, we should circle the water level and make the marking mark.
1,3 filling
Light filling temperature gap with seam-filling foam (seam-filling foam is stretchable and compressible, which can effectively reduce the change of thermal expansion and cold contraction of foundation and affect the surface appearance) reveals that part of seam-filling foam is smoothed by hand grinder, and then "V" groove is filled in two or more ways with TB-002 (the thickness of each filling is not more than 1.0mm, too thick will foam, affecting TB-00. 2 tensile properties). When TB-002 is semi-dry (before surface drying), a non-woven fabric with a width of 50 mm is attached to the surface to cover the temperature gap. The non-woven fabric can not be wider than the "V" groove or beyond the scope of the "V" groove. (Non-woven fabrics exceed the "V" groove range and bond directly with the foundation, which will cause the thermal expansion and cold contraction stress of the foundation to act directly on the non-woven fabrics and make the whole filling system lose its cushioning effect.)
1.4 bottom coating
After the foundation is dry enough, it is rolled on the base surface with special primer (TB-201). The principle is to change the base surface into wet color after brushing. The deficiencies should be repaired (the role of primer is to penetrate into the micro-holes of the foundation, and reinforce the base surface after solidification). When the surface strength of the foundation is less than C20 or the surface is loose, TB-201 can be diluted with 1 times diluent (xylene or ethyl acetate) and then coated on the base surface thickly (to enhance its permeability and increase the penetration depth of TB-201) until the surface color becomes wet, so that the foundation surface can meet the construction requirements. Construction in hot sunshine or higher base temperature (> 450C) should be avoided to ensure the permeability of primer (suitable in the morning or evening in fog-free rain weather).
When TB-201T is finished, a diluted TB-002 (with 20% diluent) will be rolled on immediately. (The function is to close the micro-holes on the surface of the foundation and prevent the air in the micro-holes from producing small pinholes when scraping TB-002; to improve the bonding of the base surface, to prevent the surface from being too smooth and to reduce the bonding strength because the TB-201 roll brush is too thick and completely cured. )
Old cement concrete foundation:
2.1 basic requirements:
Solid, flat, no sinking plate, the fracture joint is not more than 10 mm wide. If there is no reasonable temperature joint to be cut, the temperature joint must be cut according to the requirements of the new cement foundation. If the foundation is sinking or extremely uneven, and the fracture joint is too wide, it is suggested that asphalt concrete (> 40mm thick) or cement concrete (> 50mm thick) be used to lay the leveling foundation again.
2.2 basic treatment:
Basically treated according to the new cement concrete foundation treatment method. If the crack is more than 2 mm wide, the cutting machine should be used to widen the row of 6-8 mm, grinding and filling the crack according to the requirements of the new cement foundation; if the width is less than 2 mm, grinding the surface of the crack into "V" shape, the width is 40-50 mm, and the depth is 3 mm, it can be filled directly with TB-002 multi-channel.
2.3 leveling and repairing
In the area of accumulated water circled in the pickling process, the elastic layer (TB-002) with no more than 5mm of accumulated water and the special sand for the surface layer are mixed at 1:1 (weight ratio), then a proper amount of diluent is added to mix evenly and adjust to the suitable construction consistency, and the accumulated water is leveled by a ruler or scraper; if the accumulated water depth exceeds 5mm, TB-002 thin coating is applied. Once in the water accumulation area, mix 40-80 mesh sand with bottom coating (TB-201) and mix evenly according to 1:6-8 (weight ratio), spread evenly on the water accumulation area and compact. (Thin coating TB-002 guarantees that the repairing material and the base surface are firmly bonded; if the sand is finer than 80 mesh, the amount of sand added should be reduced accordingly, and the thickness of each repairing course should not exceed 15 mm.) When repairing, attention should be paid to repairing. Do not let the repaired edge be higher than the base surface. If it is higher, the elastic layer can be constructed only after solidification and grinding.
3. Asphalt Foundation:
3.1 basic requirements:
The surface of asphalt block is uniform and solid, no oil pollution, no unboiled asphalt block, flat and crack, no rotten edge pile-up, no flax surface, smooth and smooth joints, no obstruction of water, compaction density is not less than 95%. After the compaction of medium-sized roller, there is no obvious wheel track, no soft skin, no loose floating soil, wave and other phenomena, and the smoothness is 3mm. The error of straightedge is less than 3mm, the pass rate of flatness is greater than 90%, and there is a certain drainage slope to ensure discharge. The new asphalt foundation is cured naturally for no less than 28 days, which makes the volatile matter of high boiling point in asphalt volatilize completely and ensures good bonding between silicon PU material and foundation.
3.2 basic treatment:
3.2.1 cleaning:
Wash the base surface with detergent solution or detergent solution, then rinse it with clean water. After cleaning, the base should be free of dirt and other loose debris. Mark the mark of water position when cleaning.
3.2.2 leveling:
Professional bottom TB-202A:32.5R cement: 50-100 mesh sand = 1:1.25:1.25 (weight ratio) proportionally mixes evenly (water can be added to adjust construction consistency). Rubber scrapers are used to scrape on the base surface in more than two ways. It is necessary to fill the voids in the base surface and seal them so as to ensure that there are no pinholes and the surface is smooth after dry consolidation without affecting the subsequent construction. If the space of base surface is large, the first scraping can be done according to TB-202A:32.5R cement: 50-100 mesh sand = 1:2:2 (weight ratio), after mixing uniformly, and the second scraping can be done according to TB-202A:32.5R cement: 50-100 mesh sand = 1:1.25:1.25 (weight ratio). (the base surface is rough and the gap is large, and the dosage should be appropriately increased).
2. Construction of silicon PU material
(elastic layer > elastic layer > surface layer > line).
1. Elastic layer:
Before the construction of the elastic layer, it should be carefully checked to confirm that the elastic layer can be constructed after the foundation treatment. The elastic layer (TB-002) is a single component absorbent solidifying material, and the tooth scraper is directly applied to the base surface. The thickness of each scraper can not exceed 2.5mm. The dry solidification before each scraper time interval is the standard (generally about 10 hours, concrete visualization). Weather conditions) until the desired thickness is applied. When the temperature is lower and the consistency of the coating increases, appropriate diluents (xylene, ethyl acetate, 200 # solvent oil) can be added to adjust the consistency of the construction. If the temperature is lower than 15 C and the relative humidity is lower (< 60%), 3-5% water should be added to mix and scrape evenly to accelerate the solidification of the material, reduce the interval time, and the specific amount of water added depends on the day on the site. Qi is determined. Before using the diluent, a small test must be done (stirring 1.5-2mm thick sample evenly according to TB-002: diluent = 10:3) to confirm that the diluted material solidifies well before it can be used. Construction should be avoided in high temperature and hot sunshine. After construction, it should be kept from intense sunshine for 2 to 3 hours. Otherwise, surface bubbling will occur because the surface is formed too quickly. After the elastic layer is dry and solidified, the surface smoothness is tested by water accumulation method, and the water accumulation area is repaired by TB-002. If there are granular debris or accumulation on the surface, the grinder or other tools are needed to repair the surface before the construction of the reinforced layer can be carried out.
2, strengthen the level:
Strengthened layer (TB-003) is a single component absorbent material, which can be directly scraped on the repaired elastic layer by 1 to 2 rubber scrapers. The surface must be smooth and smooth after scraping, and one drying before each scraping time interval (generally about 10 hours, depending on the weather conditions on the spot) until the required thickness is scraped. If the temperature is lower (< 12 C) and the relative humidity is lower (< 60%), 2-5% water should be added to mix and scrape evenly to accelerate the solidification of the material and reduce the interval time. The specific amount of water added depends on the weather on the site. If the temperature is low, when the coating consistency increases, a suitable amount of thinner can be added to adjust the construction consistency. Construction should be avoided in high temperature and hot sunshine. After construction, it should be kept from intense sunshine for 2 to 3 hours. Otherwise, surface bubbling will occur because the surface is formed too quickly. In the construction process, if there are impurities mixed in or scraping uneven areas need to be repaired smoothly before surface construction.
3, the surface layer:
The surface layer (TB-205) is a two-component water-borne material. The two components must be fully stirred according to the prescribed proportion (group A: group B = 100:7 (weight ratio)).
