Water swelling rubber waterstop

Water swellable rubber waterstop does not mean that the waterstop expands itself, but is a kind of waterstop type which adds expansion waterproof line on the basis of ordinary buried rubber waterstop. The expanding part is the expansion line. The physical and mechanical properties of rubber part and rubber waterstop are the same, which is in accordance with the standard of GB 18173.2-2000. The rubber compound for expansion line shall comply with GB / t18173.3-2002. In addition to the performance of rubber waterstop, its main feature is that the internal waterproof line is made of rubber with water swelling characteristics. Under the action of the expansion rubber, the waterstop begins to expand when meeting water, and the tightness of the waterstop and the structure is enhanced, so that the waterproof and water sealing effect is better.

The performance characteristics of rubber expansion water stop, the volume of rubber water stop will expand when it encounters water. Therefore, this product can be widely used in various types of concrete structures, such as retaining dam, reservoir, subway, culvert, tunnel and other underground engineering. In these projects, due to the failure of continuous casting, or the deformation of foundation, or the thermal expansion and contraction of concrete components caused by temperature change, there are deformation joints and construction joints in the casting. The anti leakage problem of these joints should be solved by using rubber expansion waterstop at the deformation joints, which can not only prevent groundwater or external water from leaking to the construction site In the structure of the building, it can prevent the water in the building from leaking to the outside.

Schematic diagram of water swelling rubber waterstop

Construction method of water swelling rubber waterstop

1. In the process of bridge construction, due to the fact that there are many sharp corner stones and steel bars with sharp edges in the concrete, the impact force of pouring and tamping should be paid attention to when pouring and positioning the rubber waterstop, so as to avoid puncturing the rubber waterstop due to the excessive force. If there is any rupture, it should be repaired in time, otherwise the rubber waterstop can resist the external force when the joint deformation and water pressure are applied The range is reduced.

2. When fixing the waterstop, only the allowed parts of the waterstop can be perforated and holes should not be damaged.

3. When positioning the rubber waterstop, make sure that it is flat and flat at the interface, and it is not allowed to roll or kink the waterstop. In case of any kinking, adjustment should be made in time. When pouring and tamping, the concrete must be vibrated sufficiently to avoid bad combination of waterstop and concrete, which will affect the sealing effect.

4. The water stop joint must be well bonded and the construction site conditions are available. The method of hot vulcanization connection can be used. The so-called "lap joint" is absolutely not allowed.