Copper Waterstop Sheets

Waterstop copper sheets are categorized into three types:紫铜 (T2), composite copper, and brass. Waterstop copper sheets can be manufactured according to drawings.

Red Copper Gaskets (referring to those made from brass or pure copper), copper boasts excellent conductivity and high melting points, often used as wires or fuses. Pure copper is red in color, with a melting point around 1100°C and a density of 8.9g/cm³. The purple-red hue is due to the oxidation film formed on the copper surface, which is the reason for copper's resistance to oxidation and corrosion. The copper used in purple gasket plates is typically T2-grade ordinary brass, offering good corrosion resistance, high compressive strength, and good deformability, suitable for the foundation waterstop and dam body waterstop in high-grade hydraulic structures.
Features:
Purple止水铜plate is a high-stable, low-maintenance roofing and facade material that is environmentally friendly, safe to use, easy to process, and highly corrosion-resistant. Its yield strength and elongation are inversely proportional; the hardness of the copper plate increases significantly after being processed and bent, but it can be reduced through heat treatment. Among all building metal materials, copper's excellent elongation properties offer a significant advantage in adapting to architectural shapes. Copper plate is not limited by processing temperatures; it does not become brittle at low temperatures and can be焊接 using thermal methods like oxygen blowing at high melting points. Even in highly corrosive atmospheric environments, copper plate forms a strong, non-toxic passivation layer, commonly known as "patina." The chemical composition of this patina depends on the local air conditions, but the protective effects of the patina with various compositions are generally similar. This passivation film is highly stable, can automatically repair itself upon damage, and is hard to detect with the naked eye.
Function:
In hydraulic engineering, structures often require settlement and expansion joints for various reasons, preventing the structural integration. Without waterproofing (leak prevention) measures, water will seep out through the gaps in the structural elements. Therefore, waterproofing technology and materials are necessary to ensure the quality and safety of the project.
Application Scope:
Used for underground structures, dams, reservoirs, swimming pools, roofs, and other building materials, expansion joints, and waterproofing of building deformation joints. This product is mainly used in concrete casting, installed in construction joints and deformation joints.

Installation Instructions:
Waterstop copper plates are primarily used in hydraulic engineering to prevent groundwater leakage between floor sections, between floors and dam piers, and to address seepage and leakage issues in large reservoirs. They are commonly employed for foundation waterstops, dam body waterstops, dam crest waterstops, corridor waterstops, as well as for stopping water in internal holes within the dam, in factory buildings, and under overflow surfaces. They are currently the ideal products on the market for preventing leaks.
Due to the application fields of the waterstop copper sheet, it must first possess strong corrosion resistance and high compressive strength. Additionally, in the installation technology of waterstop copper sheets, there are many technical challenges that need to be addressed. The installation requirements vary depending on different usage scenarios and locations.
The placement of the waterstop copper sheet is not part of a single concrete pour structure; it requires separate casting. This is because there are gaps in these areas. Without treatment, water leaks continuously into the interior. Therefore, waterstop copper sheets are necessary to achieve a seal.
2. For low dams and medium dams under 50 meters, a single bottom waterstop can be used. Medium dams and high dams under 100 meters should have both bottom and top waterstops. For high dams over 100 meters, it is advisable to use both bottom and top waterstops, or bottom, middle, and top waterstops.
3. Vertical compression joints at different dam heights should use rigid flat joint structures, requiring only one bottom waterstop. The seam side should be coated with asphalt emulsion or other anti-adhesive agents. Under the waterstop copper strips, a PVC gasket should be placed and bonded to the cement mortar pad. Asphalt waterstop strips should be set at the bottom corners on both sides of the waterstop copper strips. For high dams, it is advisable to use two waterstops at the bottom and top for tensile vertical joints, while medium and low dams can use only one bottom waterstop, with the same structure as the compression joints.
4. When fixing the water stop copper strips, ensure they align with the centerline of the expansion joint to prevent displacement. Additionally, when welding the two copper strips together, the welds should be inspected repeatedly to avoid any cracks. To ensure welding quality, double-sided welding is recommended.
5. Addressing the waterstop copper sheet at the corner requires selecting the appropriate waterstop copper sheet joint, opting for a one-time molded copper waterstop joint.