Copper waterstop sheet

Copper waterstop sheets

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

Red Copper Waterstop (referring to waterstops made from brass 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 copper surface, which is also the reason for copper's resistance to oxidation corrosion. The copper used in purple waterstop plates is typically T2-grade ordinary brass, which offers good corrosion resistance, high compressive strength, and good ductility, making it suitable for the foundation waterstops and body waterstops in high-grade hydraulic structures.
Features:
Purple Stop Water Copper Plate is a high-stability, 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 bending, but it can be reduced through heat treatment. Among all building metal materials, copper's 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 oxygen吹焊等热熔焊接 methods 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 essentially the same. This passivation film is highly stable, can automatically repair itself upon damage, and is difficult to detect with the naked eye.
Purpose:
In hydraulic engineering, structures often require settlement and expansion joints for various reasons, preventing the structures from being integrated as a whole. Without adopting waterstop (leakage prevention) measures, water will seep out through the gaps in the structural components. Therefore, for the quality and safety of the project, waterstop technology and materials are necessary.
Application Scope:
Used for underground structures, dams, reservoirs, swimming pools, roofs, and other building materials, as well as in waterproofing expansion joints and cracks in buildings. This product is mainly used to be installed in construction joints and cracks during concrete pouring.

Installation Instructions:
Waterstop copper plates are primarily used in hydraulic engineering to prevent groundwater leakage at the expansion joints between floor levels and between floors and weir abutments, as well as to address seepage and leakage issues in large reservoirs. They are commonly employed for foundational waterstops, body weir waterstops, deck waterstops, corridor waterstops, and waterstops for interior holes within the dam, factory waterstops, and underflow horizontal joints, among others. They are currently the ideal products on the market for preventing leaks and seepages.
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, with varying installation requirements depending on different usage scenarios and locations.
Setting the position of the waterstop copper sheet is not a one-time concrete pouring structure; it requires separate pouring. This is because there are gaps in these areas, and water will continuously seep into the room untreated. 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 can be used. For medium dams and high dams under 100 meters, it is advisable to install waterstops at both the bottom and top. For high dams over 100 meters, choose between two waterstops at the bottom and top, or three waterstops at the bottom, middle, and top.
3. Vertical compressive joints of different dam heights should use rigid flat joint structures, requiring only one bottom waterstop. The joint surface on one side should be coated with asphalt emulsion or other anti-sticking agents. Under the waterstop copper sheet, a PVC gasket should be placed and bonded to the cement mortar cushion. Asphalt waterstop strips should be installed 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. Medium and low dams can use only one bottom waterstop, with the same structure as compressive joints.
4. When fixing 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 inspected repeatedly to avoid any seams. To ensure welding quality, double-sided welding may be used.
5. For corner water stop copper sheet treatment, it's essential to choose the appropriate water stop copper sheet joint and opt for a one-time molded copper water stop joint.