Settlement joints are working seams designed to prevent cracks or damage to the superstructure due to uneven foundation settlement. For example, settlements need to be set up in cases where there is a high difference in the height of a high-rise building, or the foundation soil of a construction is not uniform, or the connection of old and new buildings is established. Settlement joints need to completely disconnect the foundation from the superstructure. The following small series introduces the settling seam specification and the settlement joint waterproofing.
Settling seam specification
The construction of settlement joints requires that the structures on both sides of the joints be allowed to settle freely, and the leakage of water can be strictly prevented. Therefore, the settlement joints must penetrate the entire section (including the foundation). The concrete construction method of the settlement joint is as follows: Basic part: The asphalt-based wood or asphalt sand plate embedded in the original foundation construction can be left as a waterproof. If the foundation is constructed without wood, it can be filled with clay and compacted with 1:3 cement mortar at the edge of the flowing surface. The depth is about 15cm.
Body section: The outer side of the seam is filled with hot-pitched hemp, and the depth is about 5cm. The inside is filled with 1:3 cement mortar and the depth is about 15cm. It depends on the thickness of the settlement joint to be completed. The joints can be filled with bitumen bars and cement mortar; if they are too thick, the middle part can be filled with clay.
Construction quality requirements for settlement joints: The settlement joints should be neat and square, the foundations and culverts must not be staggered, and should be penetrated. The impacting materials should be closely packed.
Protective layer: All types of foundation culverts with foundations that are completed above the base of the rim, are provided with a clay protective layer around the settlement joints, with a thickness of about 20cm and a top width of about 20cm. For the basic culverts without work, the protective layer should use asphalt concrete or asphalt mortar, thickness 10-20cm.
Settlement joint waterproofing
1, before the construction of the first stop cutting and connecting the water treatment. Cut out scissors or utility knife. In order to ensure the construction quality, the sealing joints must be well bonded.
2.Because the rubber waterstop is a flexible product, when positioning the rubber waterstop, it must be kept flat at the interface, and the waterstop should not be allowed to roll or kink. The phenomenon of kinking should be promptly performed if it is found. Correction. When fixing the water stop, the deflection of the water stop should be prevented to avoid shortening on one side and affect the water stop effect.
3, in the construction process, should pay attention to the impact force of pouring, so as not to pierce the rubber water stop due to excessive strength. If it is found that there is a crack, it should be promptly repaired. Otherwise, the ability of the rubber water stop to resist external forces when the seam is deformed and subjected to water pressure will be greatly reduced. When the concrete is poured, it must also be fully shaken so as to prevent the combination of the water stop and the concrete from affecting the water stop effect.
4. After the pouring process is completed, it shall be cleaned and dried after being hardened and dried. The self-adhesiveness of the water stop shall be directly applied to the interface of the construction joint.
5, brush two times JS waterproof coating
6. After the construction of the waterproof layer is completed and cured, immediately make a protective layer of cement mortar. Protective layer construction plan: After the construction of the waterproof layer is completed and cured, 2 cm cement mortar leveling layer is immediately used as a protective layer, and the water is cured after the final coagulation.
7, SBS coil layer construction.
Settlement joint construction method
1, the basic part
Can be embedded in the original construction of asphalt board or asphalt sand, as a waterproof. If the foundation is constructed without wood, it can be filled with clay and compacted with 1:3 cement mortar at the edge of the flowing surface, with a depth of about 15 cm.
2, body parts
The outside of the seam is filled with hot-pitched hemp, with a depth of about 5cm. The inside is filled with 1:3 cement mortar and the depth is about 15cm, depending on the thickness of the settlement joint at the time of completion. The joints can be filled with bitumen bars and cement mortar; if they are too thick, the middle part can be filled with clay.
3. Settlement seam construction quality requirements
Settlement joints should be neat and square, and the foundation and culvert should not be staggered. They should be penetrated and the impacting materials should be closely packed.
4, protective layer
All types of foundations with completed foundation culverts are provided with a clay protective layer around the settlement joints, with a thickness of about 20 cm and a top width of about 20 cm. For the basic culverts without work, the protective layer should use asphalt concrete or asphalt mortar, thickness 10-20cm.
Editor's summary: The settling seam specification and settlement joint waterproofing are introduced here, and we hope to be helpful to everyone. If you want to know more about yourself, you can follow the information on this site.
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