(1) Pouring the concrete on one side of the construction joint first. Before pouring, fix the rubber water stop at the design position, and retract the 1 cm vertical form according to the design size, and ensure the rigidity, strength, and stability requirements of the formwork. When the concrete is poured, the vibrating density should be ensured near the construction joint but avoid excessive vibration, and Ensure that the deviation of the rubber waterstop during the pouring process does not exceed the specification.
(2) After the initial concrete setting, remove the formwork at the construction joint, and timely fix the pre-processed closed-cell foam board with steel nails of appropriate length on the side of the construction joint concrete, and reserve a 3 cm height on the top of the closed-cell foam board , Then fix the 3 cm high closed-cell foam slats from top to bottom with nails on the lower closed-cell foam board (a place reserved for polysulfide sealant filling), and then proceed to the other side of the concrete pouring.
(3) After the concrete reaches a certain strength, remove the reserved 3 cm high closed-cell foam slats, clean the reserved joints, and print ink lines on both sides of the entire expansion joint. The distance between the two ink lines can slightly exceed the width of the expansion joint , And stick a wide tape along the ink line (the above method can make the expansion joints straight and beautiful).
The construction method of polyethylene closed-cell foam board is as described above. In addition, during transportation, the product should be protected from direct sunlight and rain, and should be kept clean to prevent deformation, and should not be in contact with other harmful substances. Pay attention to fire prevention.
Precautions for the construction of polyethylene closed-cell foam board
1. Store in a place exposed to direct sunlight, close to a heat source. The polyethylene closed-cell foam board should be protected from direct sunlight and can be placed in a dry and ventilated place away from heat sources.
2. Put it in the rain. The polyethylene foam board cannot be placed in the rain, and the place where the polyethylene foam board is placed should be clean to prevent the polyethylene foam board from deforming.
3. Split the closed-cell foam board at will. The closed-cell foam board has a certain closed-cell structure, so try not to split the foam board at will when there is no special effect.
4. The joint part of the closed cell foam board is not processed. The connection of the polyethylene foam board should be tight and cannot be broken. The joint part of the closed-cell foam board should be flat, so the gap must be handled well and filled tightly.
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