Second-generation Silicon PU Course Material Laying Process and Basic Treatment
The second-generation silicon PU material is a true green environmental protection product without benzene solvents. It is designed specifically for new and old cement foundations. It can be applied directly on the cement foundation without foaming or cracking. It is also suitable for construction on asphalt. New Materials.
First, basic treatment (quality starts from the foundation) new cement concrete foundation
(1) Basic requirements
1. The strength is more than that of building concrete C20, the flatness is 3m, the ruler error is ≤ 3mm, there is a certain drainage slope (generally horizontal ≤ 8 ‰, longitudinal ≤ 2 ‰), and the concrete must be kept in water for no less than 7 days after casting. The conservation period is not less than 28 days.
2. The thickness of cement concrete foundation is recommended to be 8cm-10cm thick
3. Do not throw cement ash on the surface of cement concrete when casting cement concrete. Vibrate the raw slurry.
(2) Cutting temperature seam
After the new cement foundation is cast, a reasonable temperature expansion joint must be cut. In principle, a standard basketball court or a standard tennis court requires only a horizontal midline and two undercuts to cut three temperature expansion joints. There is no need to cut in the longitudinal direction, and the temperature gap must be cut between the casting construction blocks. The temperature seam width is 5~8 mm, and the depth of the seam is two thirds of the concrete foundation, so as to ensure that the basic thermal expansion and contraction energy can be concentrated in the temperature seam without causing cracks in the rest of the foundation.
(3) Temperature seam processing WA-D (light red) material
After the foundation is dry, use a special two-component (Group A and Group 1:1.5) waterproof primer WA-D to brush in the temperature seam and both sides, and then fill the gap filler material in the temperature gap, the best effect is After filling, it is slightly shallower than the seam surface by 2-3mm (reducing the shrinkage of the sealing material of the sealing material and affecting the surface effect). The exposed base surface is ground to the base surface with a portable grinding machine. Thin site (3 mm thick), the temperature of both sides of the base seam (each 40 ~ 50 mm) grinding down 1.5 ~ 2.0 mm after caulking treatment (to ensure the flatness after laying)
Second and second generation silicon PU material laying process
(1) Waterproof Substrate WA-D Material
If it is the old cement foundation, there are phenomena such as damage, moss, and ribs. Use a sander to lightly grind the ground and clean the floor and keep it dry. If it is a new cement foundation, it should be sufficiently maintained and cleaned, or see the basic maintenance. The degree can be diluted with hydrochloric acid or oxalic acid to wash the site, until the site is dry with a waterproof primer WA-D (A and B group 1:1.5) high-speed mixing, the material with a roller carefully brushed on the ground and carefully inspected, can not be omitted as coated Brush place.
(2) Stagnant water repairing WA-PU material
Where the water depth exceeds 10 mm, use an elastic material WA-PU and appropriate amount of quartz sand to adjust to a suitable construction consistency. Use a squeegee to scrape at the water. Where the water depth is less than 10 mm, directly use the elastic material WA-PU. Scraping in the water, pay attention to edging when repairing, do not make the repaired edge higher, if there is need to be smooth after the formation of the elastic layer construction.
(3) Elastic layer WA-PU material
Before the construction of the elastic layer should be carefully checked to confirm that the foundation treatment is completed before the elastic layer construction, elastic layer material preparation: pour WA-PUA and WA-PUB (A and B group 1:4) and driers (a Pouches) Stir at a high speed after mixing, and apply the material directly to the base surface with a layer of glue. (Calculate the amount of material to be paved during construction. The agitated material should be quickly finished, otherwise it will solidify wasted material) Each layer of scratching time is subject to the previous layer of dry solid (specific dry time depends on the weather conditions on site), the thickness of each layer of scratching is recommended within 2 mm, until the required thickness of the scratch. Pay attention to the effect of leveling when scraping to ensure that the surface is flat. Avoid construction under hot sun and high temperature (air bubbles are liable to occur during construction under hot sun and high temperature). After the elastic layer is solidified, measure the surface flatness with the water accumulation method.
(4) Surface WPU-A (red, green, blue, etc.) materials
The surface layer material WPU-A is a one-component environmental protection product. During the construction, a big bucket and a small bag of curing agent are mixed evenly. If it feels too thick, add proper amount of pure water (up to 500ML per barrel) and dilute it after mixing. The squeegee or spray gun or roller is applied to the surface of the elastic layer in 2 to 3 passes. The surface of the ball must be adjusted to have a friction coefficient. The surface-specific silica sand (100-140 mesh) which can be added is ≤ 30% and mixed uniformly. Surface reference practice: Table tennis, basketball courts: Add 30% special sand for the first time, 15% special sand for the second time, no special sand for the third time; Tennis court: Add 30% special sand for 2 to 3 times Scraping; badminton, volleyball court: no sand 2 to 3 times scraping, a standard tennis court, the amount of quartz sand is about 140kg), surface layer construction materials must be sufficient, otherwise it will directly affect the use of results and During the service life, it is necessary to avoid construction in the hot sun and high surface temperatures to ensure surface effects.
(5) Line WA-B (White) Material
Measure according to the standard size, mark the position of the boundary line, apply the textured paper on both sides of the boundary line and paste it on the golf course. Use special marking paint to brush on the textured paper, brush in two ways, if the surface of the court is rough, One can add a little surface special sand brush to prevent seepage, because the company's marking material is water-based aliphatic marking paint (do not fade yellow, full texture), so after the brushing surface to be dry Tear off textured paper.
Third, note:
1, must be mixed when mixing materials
2, indoor venues must ensure good ventilation
3. No water can be soaked within 8 hours after each process of the construction process
4. It takes at least 2 days for the site to be put into operation after the site is laid.
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