Complete construction steps of two-component polysulfide sealant
Many people know that the waterproof effect of the two-component polysulfide sealing paste is very strong, but they don't know what the construction steps of a complete two-component polysulfide sealing paste are. Today I will give you a detailed summary and hope that it will help you .
A complete set of two-component polysulfide sealing paste construction process is completed by the following steps
Cutting seam → cleaning filling seam → tape protection → primer coating liquid filled with polysulfide sealing paste → finished product protection
After the construction of the second liner concrete is completed, the concrete reaches 100% of the design strength. Slit construction on the water-facing surface, with a slit width of 20mm and a depth of 30mm filled with polysulfide sealant.
Before cutting the seam, the construction personnel should accurately position the cutting seam. The construction personnel used the wheel saw to cut along the tunnel's circumferential direction, and the base surface was cut regularly. To clean the joints, use a brush to remove the attachments, oil and dust on the surface to be pasted. Use a blower to blow the slits clean to expose the solid structure layer on the pasted surface. The joint surface should be completely dry and clean. Tape protection. Before construction, attach a 40mm wide protective tape at 10mm on both sides of the gap to prevent the excess polysulfide paste during construction from smudging the surface of the structure. Brush the primer liquid and fill the polysulfide sealing paste.
â‘ Apply a thin layer of base coating to the base of the application site before construction, and apply caulking after the surface is not sticky.
â‘¡The ratio of 1 barrel of white polysulfide paste A component to 1 bag of black component B is well-balanced, and the two components are mixed evenly to achieve uniform color and no color difference (Note: due to climate issues, component B should be more Summer is less) A: B = 10: 1. Fill the mixed Jianfeng polysulfide sealant with squeeze glue from bottom to top. Fill the two-component polysulfide sealant into the gap and fill it tightly. Then use a 10cm wide putty tool to smooth the glue to prevent air bubbles from mixing in.
â‘¢If the sealing paste is dripping, you should take two construction methods. The preliminary work is the same, but the paste is first applied to the concrete on both sides to form a "V" groove, and wait for the next day. Carry out secondary construction and fill the gap. ---- hsjfxj-7870
â‘£The polysulfide sealing paste is used with it. The mixed two-component polysulfide sealing paste must be used within 2 hours.
Polysulfide sealing paste finished product protection
â‘ Polysulfide sealing paste is filled and the personnel and machinery strengthen the protection of the finished product during the construction process.
â‘¡Remove the protective belt after the construction is completed, and avoid water and rain within 24 hours.
Quality inspection of polysulfide sealing paste:
1. The sealing paste and the joint surface of the concrete joint are full, the combination is firm, and there is no air bubble.
2. The protective tape can be removed, and the water will not be washed into the rainforest within 24 hours.
3. The surface is smooth and smooth; the inserts are even and smooth.
4. The gap detection requirements are as follows:
Remarks on the allowable deviation of the serial number test project design
1 Seam width 40mm 0 ~ 4mm
2 Seam depth 30mm 0 ~ 3mm
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18703187870--Two-component polysulfide sealing paste complete construction steps
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