In-situ rubber waterstop, a product mainly used for internal concrete settings in concrete deformation joints, expansion joints, etc., 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 of rubber, producing elastic deformation under various loads, thereby achieving firm sealing and effectively preventing leakage and seepage of building components. It also serves as a shock-absorbing buffer, ensuring the service life of the engineering buildings.

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 bonding with adhesive uses rubber waterstop tape and cold bonding glue. The waterstop tape to be joined is flattened using a grinder for 5~10 centimeters, then coated with glue and pressed. It boasts high strength, rapid curing, ease of construction, time and labor savings, and can meet general engineering quality requirements.

Field hot-molding vulcanization joints utilize hot-vulcanizing molds that match the waterstop and rubber sheets for on-site vulcanization bonding. Although challenging to install, these joints yield ideal results and are suitable for projects with stringent quality requirements for construction.

The structure can be divided into two types: CB type waterstop and CP type waterstop.

The CB-type waterstop is a middle-buried waterstop with holes, which can be divided into two types: CB-type rubber waterstop and CB-type plastic waterstop. It is primarily 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 is a middle-buried waterstop without holes. It comes 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 small deformation. It features tight anchoring with concrete, water-sealing, and elastic tensile deformation.

Our specifications for the design and selection of this rubber waterstop: During the engineering design and construction selection process, 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 is no more than 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 more than 20mm. When there is no vertical deformation, the width of the CB-type embedded rubber waterstop 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, as per GB 18173.2-2000, utilizes the high elasticity and compressive deformation properties of rubber to produce elastic deformation under various loads. This results in the cost-effective embedded rubber waterstop providing firm sealing and effectively preventing leakage and seepage in building components, while also serving 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 concrete pouring process, such as water channels, tunnel outlets, retaining dams, water conveyance aqueducts, and more.

The embedded rubber waterstop is partially or fully buried in the concrete during the concrete pouring process. After the concrete pour for the preceding section is completed, the construction joint interface has hardened and dried, remove the surface debris. Before burying the concrete, ensure the interface is flat and the joint section is securely bonded. The waterstop joints must be well bonded; on-site conditions permitting, thermal vulcanization bonding can be used. Unprocessed "lap joints" are not permitted. Subsequently, use appropriate force to thoroughly compact and vibrate the concrete 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, attention should be paid to the impact force during pouring and positioning the waterstop to prevent piercing the rubber waterstop due to excessive force. If any cracking is found, 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 waterstops, the product must be securely installed to prevent displacement during concrete pouring and ensure the correct placement of the waterstop within the concrete. It is crucial to keep it flat at the interface and avoid any rolling or knotting of the waterstop. If knots are found, they should be adjusted promptly. Common methods for securing waterstops include: using additional rebar; fixing with clamps; using wire and formwork, etc. When piercing, it can only be done in the edge installation area of the waterstop, and care must be taken not to damage other parts.