In-situ rubber waterstop, a product mainly used for concrete deformation joints, expansion joints, and other internal concrete settings, with the ability to adapt to concrete expansion and deformation through the elasticity of rubber material and its structural form. This product utilizes the high elasticity and compressive deformation properties of rubber to produce elastic deformation under various loads, thereby achieving tight sealing and effectively preventing water leakage and seepage in building components. It also serves as a shock-absorbing and buffering function, ensuring the service life of the engineering structures.

Application and Temperature Range:

Standard Type: -25℃ to +60℃

Cold-resistant: -40℃ to +60℃

There are two methods for connecting buried rubber waterstop joints: one is to use an adhesive for cold joints, and the other is to use a hot vulcanization mold for hot joints.

Below, we introduce two methods of joints: Cold jointing with adhesive uses rubber waterstop strips and cold jointing glue. The waterstop strip to be joined is flattened using a grinder for 5~10 cm, then coated with glue and compacted. It boasts high strength, quick curing, ease of construction, time and labor-saving, and can meet general engineering quality requirements.

Field hot-molding vulcanization joints utilize matching hot-vulcanization molds and raw rubber sheets for on-site hot vulcanization. While difficult to install, these joints yield ideal results and are suitable for projects with stringent quality requirements for engineering works.

Structurally, they can be divided into two types: CB type waterstop and CP type waterstop.

The CB-type waterstop refers to the middle-pitched embedded waterstop with holes, which can be divided into two types: CB-type rubber waterstop and CB-type plastic waterstop. It is mainly used for expansion joints, settlement joints, and seismic joints in various concrete structures, featuring tight anchoring with concrete, water-sealing, and the ability to adapt to the expansion and contraction of deformation joints.

The CP-type waterstop refers to an embedded waterstop with no holes in the middle, available in two types: CP-type rubber waterstop and CP-type plastic waterstop. It is mainly used for construction joints, complete shrinkage joints, incomplete shrinkage joints, and expansion joints in concrete structures with minor deformation. It features tight anchoring to concrete, water-tight sealing, and elastic tensile deformation.

Our specifications for the design and selection of this rubber waterstop: During the process of engineering design and construction selection, the width and thickness of the CB-type embedded rubber waterstop should be determined according to the following conditions:

When the water pressure is less than 4m and the horizontal and vertical deformation does not exceed 10mm, the width of the CB-type embedded rubber waterstop should not be less than 200mm, and the thickness should not be less than 5mm.

2. When the water pressure is 4-8m and the horizontal and vertical deformation does not exceed 30mm, the width of the CB-type embedded rubber waterstop should not be less than 300mm, and the thickness should not be less than 6mm.

3. When the water pressure exceeds 8m and the horizontal and vertical deformation exceeds 30mm, the width of the CB-type embedded rubber waterstop should not be less than 350mm, and the thickness should not be less than 8mm.

4. Water pressure not exceeding 8m, horizontal deformation not to exceed 20mm; when no vertical deformation is present, the width of the embedded rubber waterstop in the CB type should not be less than 200mm, and the thickness should not be less than 5mm.

In addition, when the structural cross-sectional dimensions exceed 500mm, the width of the CB-type embedded rubber waterstop should not be less than 300mm. When the CB-type waterstop is bent, the turning radius must be no less than 300mm. The product standard for the embedded rubber waterstop follows GB 18173.2-2000, utilizing the high elasticity and compressive deformation of rubber to produce elastic deformation under various loads. This economical embedded rubber waterstop effectively secures and seals, preventing water leakage and seepage in building components, and also serves as a shock-absorbing buffer, ensuring the service life of the construction. This product is mainly used in the deformation joints that must be installed during the cast-in-place concrete, such as water channels, tunnel outlets, retaining dams, water conveyance aqueducts, etc.

The middle-buried rubber waterstop is partially or fully embedded in the concrete during the concrete pouring process. After the concrete pouring of the previous section is completed, the construction joint interface hardens and dries, the surface debris is cleared, and before embedding the concrete, it must be kept flat at the interface and the joint parts must be securely bonded. The waterstop joints must be bonded well. On-site conditions being met, the method of hot vulcanization connection can be used. Unprocessed so-called "lap joints" are not permitted. Then, thoroughly compact the concrete with appropriate force and vibrate it to position the waterstop, ensuring a good bond with the concrete to avoid affecting the waterstop's performance.

During construction, due to the presence of many sharp-edged stones and pointed rebars in the concrete, care should be taken with the impact force during pouring and positioning the waterstop. Avoid piercing the rubber waterstop with excessive force. If any cracking is detected, it should be repaired promptly. Otherwise, the rubber waterstop's ability to resist external forces will significantly decrease when the joint deforms and is subjected to water pressure.

When positioning rubber waterstop strips, the installation must be securely fixed to prevent displacement during concrete pouring, ensuring the waterstop is correctly positioned in the concrete. It must remain flat at the interface and must not roll or tangle. If tangles are found, they should be adjusted promptly. Common methods for securing waterstop strips include: using additional rebar; using clamps; and securing with wire and formwork. If drilling is necessary, it should only be done in the edge installation area of the waterstop, without damaging other parts.