Copper waterstop sheet

Waterstop Copper Sheet

Waterstop copper sheets are available in three types:紫铜（T2）, composite copper, and brass. Copper waterstop sheets can be produced and processed according to drawings.

Zinc-free copper stopper (referring to copper processed from purple copper or pure copper), copper boasts excellent conductivity and high melting point, often used as wiring 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 surface of copper, and it is this oxidation film that contributes to copper's resistance to oxidation and corrosion. The copper used for purple stopper plates is typically T2-grade ordinary purple copper. Stopper plates are known for their good corrosion resistance, high compressive strength, and excellent formability, making them suitable for the foundation waterstop in advanced hydraulic structures and dam body waterstops.
Features:
Purple Stopwater Copper Sheet is a high-stability, low-maintenance material for roofing and facade, offering environmental protection, safety in use, ease of processing, and excellent corrosion resistance. Its yield strength and elongation are inversely proportional; the hardness of the sheet increases after bending due to processing, but can be reduced through heat treatment. Among all building metal materials, copper's elongation properties give it a significant advantage in adapting to architectural shapes. Copper sheets are not limited by processing temperatures, remain nonbrittle at low temperatures, and can be焊接 using oxygen吹焊等方法 at high melting points. Even in highly corrosive atmospheric environments, copper sheets form a robust, non-toxic passivation layer, commonly known as "patina." The chemical composition of this patina depends on local air conditions, but the protective effects of the various components are generally similar. This passivation film is highly stable, can self-repair upon damage, and is difficult to detect with the naked eye.
Function:
In hydraulic engineering, structures often require settlement and expansion joints for various reasons, preventing the structure from being a cohesive unit. Without water-stop (leak prevention) measures, water will leak through the gaps in the structural components. To ensure the quality and safety of the project, water-stop techniques and materials are necessary.
Application Range:
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 abutments, and to address seepage and leakage issues in large reservoirs. They are commonly employed for foundation waterstops, embankment waterstops, dam crest waterstops, gallery 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, there are many technical challenges that need to be addressed in the installation technology of waterstop copper sheets. The installation requirements vary depending on different usage scenarios and locations.
The positioning of the waterstop copper sheets is not a one-time concrete pouring structure; they require separate pouring. This is because there are gaps in these areas, and water will continuously seep into the room if not treated. Therefore, waterstop copper sheets are needed to achieve the purpose of sealing.
2. Set several waterstop copper strips: For low dams and medium dams under 50 meters, a single bottom waterstop may be sufficient. For medium dams and high dams under 100 meters, it is advisable to install both bottom and top waterstops. For high dams over 100 meters, consider using both bottom and top waterstops, or a combination of bottom, middle, and top waterstops.
3. For vertical compression joints with different dam heights, a rigid flat joint structure should be used, requiring only one bottom waterstop. The face of the joint on one side should be coated with asphalt emulsion or other anti-adhesive agents. A PVC gasket should be placed below the waterstop copper sheet and bonded to a cement mortar base. Asphalt grouting strips should be set at the bottom corners on both sides of the waterstop copper sheet. For high dams, it is advisable to use two waterstops at the bottom and top for tensile vertical joints. Medium and low dams can use only one bottom waterstop, with the same structure as compression joints.
4. When securing the waterstop copper strips, ensure they align with the centerline of the expansion joint to prevent misalignment. When welding the two copper strips together, the welds should be repeatedly inspected to avoid seam issues. To guarantee welding quality, double-sided welding is recommended.
5. When dealing with water-seal copper sheet at the corner, select the appropriate water-seal copper sheet connector, opting for a one-time molding copper water-seal connector.