rubber track Several points should be paid attention to during construction: In order to ensure the smoothness and slope of the polyurethane plastic runway surface and the quality of the future use of the plastic runway, the asphalt concrete foundation must be checked and accepted before construction. The plastic surface layer can be laid behind. The ambient temperature for site laying should be controlled between 5 ° C and 38 ° C, avoiding operation below 5 ° C and above 38 ° C, and relative humidity controlled below 70%. The foundation needs to be level and clean. The curing speed is properly controlled. When the color paste and prepolymer are stored, the bucket lid must be tightened, and the water content must be tested before use. After passing the product, the water content in the foundation must be controlled to avoid air bubbles after gelling. Plastic runway Plastic pavement materials must be carefully checked for quality inspection certificate and expiration date when leaving the factory.
(1) Test before paving construction:
First, the two-component slurry and prepolymer used in the polyurethane plastic track are sorted according to the production batch number. Then take samples according to the on-site environmental conditions to conduct the gelation test and the wire drawing gelation test. If it is found that the gelation speed of a certain batch of slurry is too slow, adjust the amount of catalyst to adjust the gelation speed to achieve a suitable gelation speed. If a batch of slurry is found to be non-gelling, adjust the amount of prepolymer to improve it to achieve gelation. If foaming occurs during the gelation of a batch of slurry or a bucket of slurry, the batch of slurry or the bucket of slurry is stacked separately and left for factory rework.
(2) Pinning of mould bars:
According to the pre-arranged area, nail the wooden mold strip wrapped with polyethylene film along the drawn bottom line. The mold strips should be flat and implemented with the foundation nails to prevent material leakage.
(3) Survey bottom line:
In order to reasonably arrange the daily pavement workload, the dividing line must be measured and drawn according to the set plan based on the basis, the entire track and field field is divided into strips, and then the paving is performed on a strip-by-block basis. In order to ensure smooth drainage and few joints, the construction procedures of the inner ring and the outer ring are adopted.
(4) Preparation of finished products:
Calculate the required semi-finished products according to the pavement area, hoist the required slurry and prepolymer on the operation table, and discharge them neatly according to the batch number. Place the required vinyl particles and catalyst in the appropriate positions on the operating table.
(5) Emergency handling during paving:
During the construction of plastic runways, many emergency situations are often encountered. The general conditions are: rain, wind, power outages, etc. Emergency treatment methods are:
If there is a sudden rain emergency during the construction of the plastic runway, stop the batching immediately and cover the motor, agitator and bucket with a plastic film that has been prepared in advance. Immediately pour the glue into the hopper truck and dispose of the garbage. The paving process should quickly spread the remaining glue into the mold cavity. If the operator finds that there is still a large area of undispersed granules, the operator immediately stops spreading the granules and waits for the next day to scrape a layer of glue on the solidified rubber surface and then spread the granules.
If a windy emergency occurs during the pavement construction process, immediately stop the batching and paving procedures. If debris is found in the glue or on the liquid surface, the debris should be continuously removed. If any debris is blown onto the glue during the spreading process, remove the debris before spraying the gel.
If the power outage is found during the batching process, repair the circuit immediately if it can be repaired. If it cannot be repaired in time, stop the batching immediately and notify the paving process to prepare for the shutdown. If there is any material in the blender, it should be disposed of.
(6) Mapping of marker lines
Measure in accordance with international standard track and field standards (or non-standard venue design), and draw various runway marking lines.
(7) Precautions for spray painting of marking lines:
a. Correctly use the theodolite, steel tape measure and other measuring tools to determine the positions of various marking lines according to the IAAF standards. Repeat the measurement and check to ensure that the required accuracy is achieved. Only use a marker (special pencil) in plastic. The top layer is marked with a line.
b. After marking, it needs to be reviewed by sports craftsman. The angle part is checked with the length of the radiation, and the straight part is checked with the identified steel ruler (including ruler length correction and temperature correction). After confirming that it meets the standards, it can be painted in accordance with the IAAF color logo.
c. When spraying paint, it is necessary to repeatedly check whether the width of the spray line wooden box meets the requirements of Tianlian. If it does not, it should be adjusted in time.
d. Painting operators should master the distance (from the plastic surface) and angle of the spray gun, so that the lines are beautiful and the color is uniform. Various lines are accurate, clear, bright, straight, smooth and smooth, without yellowing or reflection. The pure distance size of various points, the accuracy error is less than one ten thousandth.
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