The rubber waterstop, as its name implies, plays a role of waterproof and waterstop. If the rubber waterstop is damaged, it will fail to meet the requirements of waterproof and waterstop. How to deal with the damaged rubber waterstop?
Damage treatment of rubber waterstop:
1. The concrete at the damaged part of the rubber waterstop shall be chiseled into a groove, which is 3cm deep and 5cm wide. In this construction process, attention should be paid to protecting the unbroken waterstop to prevent it from being damaged again.
2. Take out the damaged rubber waterstop and replace it with a new one. Rubber waterstop Connector The joint of rubber waterstop can be bonded with building sealant. After the joint is bonded, the newly installed rubber waterstop can be fixed in the groove. Later, the two-component polysulfide sealant will be used to seal the construction site.
Precautions for repairing damaged rubber waterstop:
1. Before construction, the construction interface must be flat and dry to make the waterstop easier to fix during construction.
2. If there is sanding or uneven height on the foundation surface, it should be re plastered cement mortar After finishing and reaching the specified strength grade of cement mortar, construction can be carried out. The pouring time of the post poured concrete in the external rubber waterstop shall be different according to different types of post poured strips. Expansion and post pouring strip - it depends on the completion time of shrinkage of the first poured concrete. The concrete cured under different cement types, water cement ratios and temperature conditions shall be determined according to the time of completion of shrinkage. Generally, the post pouring strip concrete shall be poured 60 days after the pouring construction, and it shall not be less than 30 days when the construction period is urgent and there are special difficulties. The settlement post cast strip shall be reserved. Generally, the concrete of the post cast strip shall be poured after the building settlement is stable.
The joint form of external rubber waterstop must be constructed in strict accordance with the construction drawing. Construction joint To be used during construction Plug Plate or install convex strip on the plug plate according to the interface form. Before pouring concrete, the hardened concrete surface shall be cleaned, roughened and wetted, and the concrete at this place must be vibrated and compacted to make the concrete closely combined with the hardened concrete. In particular, the basement floor should pay more attention to improving its structural self waterproof ability to avoid water seepage.
Externally attached waterstop, also known as back attached waterstop or external waterstop, is a waterstop structure set outside the concrete deformation joint and settlement joint wallboard (upstream surface) of underground structures. It has the ability to adapt to concrete expansion and deformation based on the material elasticity and structural form of waterstop. It can be divided into externally attached rubber waterstop External plastic waterstop, external rubber plastic waterstop and medium buried water swelling waterstop can be divided into EB type waterstop and EP type waterstop in terms of structure. It is worth noting that since the externally attached waterstop is set on the upstream surface of the concrete, it is often required to weld and seal with the waterproof board during construction, so in this case, the externally attached waterstop with the same material as the waterproof board should be selected (for example, EVA externally attached waterstop is selected for EVA waterproof board). In addition, after the use of externally attached waterstop, When backfilling outside the concrete wallboard, attention shall be paid to the protection of externally attached waterstop.
The externally attached waterstop is a kind of rubber waterstop. The waterstop product we produce is characterized by flat plate on one side and waterproof line on the other. External rubber waterstop can be divided into two types according to the pattern of holes in the middle. One is external rubber waterstop with holes in the middle called EB type external rubber waterstop and external rubber waterstop with holes in the middle called EP type external rubber waterstop. Its advantages mainly lie in that it is set in the construction joint and deformation joint when the concrete is poured in situ, and it is integrated with the concrete structure in the foundation project, such as underground facilities, tunnel culverts, water conveyance aqueducts, water retaining dams, etc., to ensure the service life of the project construction.
The specifications of rubber waterstops shall be specified in advance. What are the symbols R, Ф and δ? "R" represents the radius from the center of the middle circular hole to the outer edge hole of the circular hole. "δ" refers to the thickness of the rubber plate, excluding the waterproof line. It refers to the thickness of the rubber plate. "Ф" refers to the diameter of the through hole in the middle of the hose. For example, ordering a rubber waterstop with a specification of 300 * R16 * Ф 12 * δ 10mm means that a rubber waterstop with a width of 300mm, an outer radius of the middle hole of 16mm, a diameter of 12mm in the center and a thickness of δ 10mm is required.
The detachable waterstop shall first be installed with embedded bolts in advance, and the bolts shall be coated with butter or PVC sleeves to prevent corrosion. The required accessories shall be complete at one time, and the embedded bolts shall be fixed in the pre embedded steel plate with steel plate waterstop. Secondly, the number of fasteners at the corner should be more than that of ordinary rubber waterstop fasteners, and they should be poured and embedded in the concrete to ensure its compactness. The corner should be made into a 45 degree angle. And when the detachable waterstop (piece) installed on the embedded bolt with splint is used between the splint and the embedded part, asbestos paper or soft metal sheet gasket shall be used for tightness. The distance between the two adjacent bolt heads shall not affect the installation of the waterstop and the waterstop splint. The waterstop shall be fixed by belt punching and punching according to the actual position of the bolts on site. The waterstop shall not be pulled forcibly during the installation of the waterstop. The asbestos paper or soft metal sheet gasket shall be filled between the waterstop and the splint and between the waterstop and the embedded steel plate to ensure tightness.
