As a leading manufacturer with over 10 years of experience in formwork accessories, we have created this Joint Aluminum Bar backed by an intelligent production line with an annual capacity of 80,000 tons and verification from more than 3,000 global projects. Abandoning the drawbacks of traditional connectors such as frequent grout leakage and cumbersome installation, it adopts 6061-T6 high-strength aluminum alloy as the core material, integrated with precision structural design and multiple anti-corrosion processes. It not only achieves the dual effects of "seamless alignment + strong locking" for formwork splicing but also reduces secondary trimming costs by 30%, making it the preferred accessory for high-rise buildings and bridge projects.
1. Core Advantages: Redefining Aluminum Formwork Splicing Standards
1.1 High-Strength Material: Double Guarantee for Load-Bearing & Durability
Made of aviation-grade 6061-T6 aluminum alloy through extrusion, it has a tensile strength of over 310MPa, surpassing the 200MPa standard of ordinary aluminum materials . It can withstand lateral pressure up to 40kN/m² during concrete pouring without deformation. The surface undergoes 12μm thick electro-galvanizing treatment, achieving over 5,000 hours of salt spray resistance . It can be reused more than 500 times in humid construction environments, with a service life 10 times longer than ordinary carbon steel connectors.
1.2 Seamless Sealing Design: Completely Solving Grout Leakage Pain Points
Innovative "stepped fitting + serrated locking edge" structure, with a tight fit of less than 0.1mm with the formwork panel after insertion. Equipped with a built-in EPDM sealing strip, it can block over 99% of cement paste leakage paths . No additional sealing tape is needed, and the concrete surface has no honeycomb defects after formwork removal, reducing 80% of wall trimming man-hours and directly meeting the "plaster-free" construction standard.
1.3 Quick Installation & Adaptability: Suitable for Multiple Scenarios
Available in a full range of specifications including 45mm, 55mm, 83mm, 150mm, and 200mm, it can adapt to 6-20mm thick aluminum formwork splicing, compatible with various scenarios such as flat surfaces, corners, and internal/external angles . No special tools are required; one person can complete the "insert-lock" operation in 10 seconds, which is 200% more efficient than traditional bolt connection, saving 12 man-hours for 1,000㎡ formwork projects.
2. Core Technical Parameters & Specifications
| Parameter Category | Details |
|---|---|
| Material | 6061-T6 aluminum alloy (6063-T5 optional) |
| Tensile Strength | ≥310MPa |
| Surface Treatment | Electro-galvanizing (12μm), anodizing (optional, film thickness ≥10μm) |
| Dimensions | Length: 45-200mm (customizable within 300mm); Width: 24-36mm; Thickness: 2.5-4mm |
| Temperature Range | -40℃~+120℃ |
| Salt Spray Corrosion Resistance | ≥5,000 hours (neutral salt spray test) |
| Reuse Cycles | ≥500 times |
| Adaptable Formwork Thickness | 6-20mm (compatible with steel and aluminum formwork) |
3. Product Structure Analysis
3.1 Main Aluminum Bar (Load-Bearing Core)
One-piece extrusion molding without welding breaks, ensuring uniform overall load-bearing. The fitting surface undergoes precision milling with a flatness error of ≤0.02mm, enabling tight engagement with the formwork panel to avoid splicing misalignment caused by gaps.
3.2 Serrated Locking Edge (Anti-Loosening Key)
30° inclined serrated structure on one side, which automatically locks after inserting into the formwork slot. No loosening or displacement occurs under concrete vibration (10-50Hz), with anti-loosening effect 3 times higher than smooth edge design .
3.3 Sealing Strip Groove (Sealing Guarantee)
1.5mm wide EPDM strip groove reserved. The strip is made of aging-resistant material with Shore hardness 70°, which can be reused synchronously with the aluminum bar without frequent replacement, reducing consumable costs.
4. Installation & Maintenance Guide
4.1 Quick Installation Steps (One-Person Operation)
Clean concrete residues at formwork joints to ensure flat fitting surfaces;
Select aluminum bars of corresponding specifications according to formwork thickness, insert the side with the sealing strip into the joint inward;
Tap both ends of the aluminum bar lightly with a rubber hammer until the serrated structure fully snaps into the formwork slot (a "click" sound is heard);
Check the fitting degree before pouring to ensure no warping or gaps.
4.2 Reuse & Maintenance Tips
Wipe surface cement paste with a damp cloth after formwork removal, avoiding scratches on the galvanized layer with hard objects;
Check if the sealing strip is aging; replace it promptly if cracks appear (cost per strip is only $0.07);
Store in a dry and ventilated place with a stacking height not exceeding 1.5 meters to prevent extrusion deformation.
