PU plastic stadium construction plan

First, the asphalt foundation construction plan:

On-site information: Considering that the site of this project is a cement concrete foundation and there are silicon PUs used for many years. Silicon PU is difficult to eradicate, so it is not recommended to remove the silicone PU and then PU plastic. It is recommended to lay 50mm thick asphalt concrete foundation on the original foundation.

1) Fine aggregate Asphalt ç ¼ 50mm thick, evenly laid, dense, no significant large surface oil pollution. The joint construction roller compaction should be uniform, flat, and well-fixed. If there are cracks, honeycombs, peeling, material movement, etc., they should be dug out, cleaned, and repaired with hot asphalt concrete, and then compacted. Surface treatment with bitumen oil.

å¡‘èƒ¶çƒåœº

2) After the asphalt foundation is completed, its surface shall be completely smooth, with no defects such as flaws, induration, bulges or depressions, cracks, etc., and the density shall be uniform. Check with a 3m ruler and the positive and negative values â€‹â€‹shall not exceed 3mm. After completion of the asphalt layer, It is necessary to pay attention to the maintenance of finished products and prohibit vehicles and garbage from entering the venue.

3) Asphalt Concrete Raw Material Requirements: Asphalt uses local road asphalt.

4) Crude asphalt concrete material ratio: Sand: Stone chips: Coarse sand: powdered needle = 45:20:28:7.

Grade table:

Aperture mm	35	30	25	15	10	5	2.5	0.6	0.075
General purpose%	100	70-100	60-95	38-70	20-55	5-35	2-24	2-13	2-8

Fine bituminous concrete material ratio: Chips: coarse sand: powdered needle = 54:35:11.

Grade table:

Aperture mm	15	5	2.6	1.2	0.6	0.3	0.15	0.075
General purpose%	95-100	65-75	40-55	32-47	23-38	14-20	8-15	6-12

Asphalt usage: The amount of oil used for hot-frying asphalt is 4.5-4.8%, and that for emulsified asphalt is 8-10%.

Fine asphalt concrete quality indicators: R20 strength> 25kg/cm2 R50 strength> 25kg/cm2.

Thermal stability factor: k=R20/R50

Second, PU plastic surface construction program (thickness 5mm):

1) Test Shop: After the optimal mix ratio of the test shop is used as the basis, and according to the temperature and air humidity adjustment ratios on the day, the proportioning ingredients shall be strictly followed. It is necessary to ensure the accuracy of the metrics and balances when the material is switched on and stirring the ingredients. Secondly, there must be reviewers in addition to the ingredient makers. Third, each weighing must be in accordance with procedures and records. Fourth, the mixing time must be strictly controlled and the mixing must be uniform. Master the feeding rhythm and cutting location.

2) Substrate paving: After mixing and proportioning materials are transported to the pushing site, the paving begins and the paving begins. During the paving, attention should be paid to two points: First, the thickness should be checked at any time, only the positive difference is allowed and the negative difference is not allowed. Is to adjust the proportion of catalyst at any time according to the temperature change, to prevent the mortar is too thick, the curing time is slow and the phenomenon of internal thickness is thin and thin, and the third is to arrange the paving time as late as possible after 4 pm or before 10 am To prevent the temperature from being too high, the raw material will cause foaming during the curing process and affect the quality. Substrate laying 4-5 work sections, after laying is inspected: whether there is a drum, separation and loose phenomenon, if any such phenomenon, should promptly analyze the reasons and do a thorough treatment, and second, the flatness for the first time Detection, dents filled in time, protruding to polish, confirm the thickness of the substrate, flatness and quality to meet the requirements before the surface to lay, in order to ensure the surface layer laid flatness and overall quality. The bottom layer is a two-component polyurethane. The ratio of pre-collection to colorant is 1:4. It does not contain reconstituted black rubber particles and its thickness is 2.5mm.

3) Laying of the surface material: After the substrate is laid and tested to meet the requirements, a layer of 2.5mm thick polyurethane rubber shall be laid on the surface of the substrate. The surface layer is a two-component polyurethane with a pre-collection and colorant ratio of 1:4, no recycled vinyl, and a thickness of 2.5 mm. After the substrate is laid and tested to meet the requirements, a 2.5mm thick polyurethane mortar is laid on the surface of the substrate.

4) Anti-skid wear layer:

After the plastic elastic layer is maintained, apply a layer of non-slip and wear-resistant top coat on it.

5) Draw marker lines

After the completion of the laying of the PU plastic surface layer, do a good job of sanitation and cleaning. After the completion, you can start marking. The steps are as follows:

1 First, use the laser range finder and Jingweiyi to recheck the four basic pile points. After the error is calibrated and determined, measure according to the standard and determine four basic points. Using this as a benchmark, divide the line with a steel ruler, make a good mark, and then use a fish wire with a certain toughness to connect the points of the straight line.

2 paste color paper, adjust the line paint to start spraying. Make sure that the error of the line width is strictly controlled at the minimum allowed by the rules.

3 mark line jet precautions:

a. Before the spray line, the site should be thoroughly cleaned. The color separation paper should be tightly adhered, and the separation line should be removed after the boundary line oil is completely dry.

b. When the wind is blowing, the line cannot be sprayed to prevent the occurrence of imaginary edges due to the influence of wind.

c. After the release of the line, it shall be reviewed by a sports technician, and the qualified steel ruler (including the ruler length correction and temperature correction) shall be re-qualified before being sprayed to paint according to the provisions of the League of Nations.

Third, site maintenance:

After 1 finish, the warranty period is 7 days.

2 The ball scene layer of any material should maintain its neat structure and the integrity of the course equipment. Attention should be paid to not scratching the surface while sweeping the water, and avoiding organic solvents and pigmented beverages from dissolving or contaminating the surface layer (including Tian Na Shui, Gasoline, engine oil, etc.);

3 to avoid hard objects hitting, digging, drawing, puncture the surface layer (including plastic sandals, high heels, etc.);

4 Into the stadium should wear rubber-soled sports shoes, players in the plastic surface do not wear black and color bottom shoes to play, so as not to leave traces of other colors after friction;

5 Rinse the floor regularly with water to keep the floor clean. Do not use other cleaning tools;

6 Do not use rackets to hit the ground. Do not perform other operations on the court. Once the scenes are scratched or small areas are removed, they should be repaired with the same materials in time.

7 It is forbidden to change any course equipment.

8 All motorized and non-motorized vehicles are strictly prohibited;

9 Rinse regularly with tap water and keep it clean.