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Experience of leakage stoppage of expansion joint

Hits: 1813 Release: August 31, 2018 source: Plugging company_ Leak stoppage basement_ Pool plugging - Xinda waterproof and plugging Engineering Co., Ltd

1. Experience in plugging expansion joints:


1. Before construction, the foreign matters filled in the gap shall be cleaned up. If the base surface is wet, it shall be dried with a blowtorch and then brushed with a steel wire to remove the cement chips and dust dropped after baking. The oil stain, plastic attachments and other foreign matters on the surface to be adhered shall be removed, so as to expose a firm structural layer on the glued surface. The joint surface must be completely dry and clean.


2. Before construction, a protective tape with a width of 50 mm should be pasted on the 10 mm side of the gap to prevent the surface of the structure from being dirty by the excess sealant during the construction.




3. Fill the backing material, use polyethylene foam board to fill the gap equal to 20 mm wide and 30 mm deep, and the gap depth after filling is more than 20 mm.


The application of bottom coating liquid can achieve the effect of side coating. Jiangsu Xinda plugging


5. Prepare the two-component polysulfide sealant according to the requirements of the analysis book. The mechanical mixing time should be more than six minutes, and the mixing time should be long rather than short, so as to avoid the uneven curing caused by uneven mixing, which can not achieve the curing effect. The prepared sealant must be used up within two hours to avoid curing waste.


6. During the construction, a layer of the prepared sealant is applied on the side of the joint with a gray knife, and then the sealant is embedded into the center of the joint with a thickness of 20 mm. When applying the sealant, it should be tamped and leveled to prevent air bubbles from mixing in.


7. After the construction, take off the belt at the back side, and avoid the rain and water within 24 hours. After seven days, the water filling test can be carried out, and the performance can be achieved in 28 days.



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