When the upper floor slab formwork is installed and fixed, the upper layer is aligned with the center of the lower hole in the upper layer, and the line refers to the bottom of the template, and the line contact position is recorded. At this point, drill D=10 holes with electric drill, and only need to drill two holes for each mold, then the mold can be positioned, and the vertical and horizontal axes of the room can be positioned. Centering on the hole in the template, place two tool-type steel tubes and fix them on the template with 8 screws. After the slab reinforcement is fixed, the standard mold is placed on the outer edge of the two fixed steel pipes, and then other tool-type steel pipes are placed in the other ferrules, thereby completing the positioning and fixing work of the tool steel pipe. Pour the standard mold and then take it out to the top.
The mortar is replaced with a suitable expansion agent, and the strength grade is C25 fine stone concrete, and should be poured to a height of 20 mm below the structural layer and then made of a round bar shape of 10 mm higher with a polyurethane sealing paste. Because the polyurethane sealing paste can be tightly bonded to the pipe and has flexibility to resist various deformations and disturbances of the pipe, a rigid and flexible waterproof line is formed. Each floor drain elevation must be based on the actual elevation of the floor, and it is expected to find the slope layer, waterproof layer, leveling layer, bonding layer, thickness of the surface layer, and accurate positioning. The elevation of the floor drain tweezers should be less than 5mm below the surrounding ground. For the floor slab pipe, the 40mm30mm round table can be used to prevent the water from approaching the root of the pipe and protect the waterproof layer. The round table should be covered with 10% drainage slope, and the round table and the pipe should be reserved for 10mm. Grooved and sealed with a polyurethane sealant. For the floor drain, the waterproof layer should be made to the inside of the floor drain. The floor drain height should be 20mm lower than the floor tile; the surrounding floor tiles should be 3%.
When the ground is finished, the bathroom must be tested one by one. The method is the same as the water storage test of the waterproof layer. After checking the bottom of the board without leakage and dredging the floor drain, there is no water on the ground. When the unit project is completed and the quality level is completed, it is necessary to check at least 15% of the bathroom for water storage test and at least 15% of the room for water splash test. If the test is found to leak or slope in any room, the project shall not be qualified. , to be fully inspected, can be re-approved after the repair is qualified. Through the improvement of the whole process of the construction operation of this part, it can achieve twice the result with half the effort. This continuous overall waterproof layer measures the combination of anti-discharge combination, rigid and flexible combination, joint sealing, composite waterproof, multi-channel defense design principle. In recent years, we have adopted this improved approach to ensure the quality of waterproofing projects in kitchens and bathrooms, and achieved good economic and social benefits.
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