How to Choose Formwork? Wood, Aluminum Formwork and Reuse Cycles
AI Summary: Concrete formwork includes wood plywood, bamboo plywood, steel formwork and aluminum formwork. Wood formwork is low-cost, easy to process and suitable for irregular shapes; aluminum formwork offers high reuse cycles and good forming quality, suitable for standardized high-rise buildings; steel formwork has high strength but is heavy. Selection depends on project type, reuse cycles, concrete appearance, labor and cost, together with matching supports and release agents.
Procurement Checklist
| Review Item | Selection Point |
|---|---|
| Project Characteristics | Standardized high-rise suits aluminum formwork; irregular and small projects suit wood formwork |
| Reuse Cycles | The higher the reuse cycles, the lower the cost per use may be |
| Forming Quality | Formwork flatness and joint gaps affect concrete appearance |
| Support System | Vertical posts, joists and tie rods should be calculated as a matched set |
| Release and Maintenance | Use release agent correctly and clean and repair in time |
Procurement, Installation and Use Points
1. Aluminum formwork suits repeated unit layouts
With high standardization and many floors, aluminum formwork has clear advantages in overall cost and schedule.
2. Wood formwork focuses on reuse and waterproofing
Plywood delaminates easily when damp or exposed to sun; cut and maintain it properly.
3. The support system determines safety
Formwork collapse is mostly related to support calculation, erection and pouring sequence.
4. Pour in layers according to the plan
Pouring too high or too fast at one time increases lateral pressure and instability risk.
FAQ Quick Answers
Is the large upfront investment in aluminum formwork worthwhile?
Usually worthwhile for high-reuse, standardized projects, but not necessarily for small projects.
How many times can wood formwork be used?
It depends on quality, maintenance and location, with wide variation.
Why is the concrete surface uneven?
It is related to formwork stiffness, joint gaps and supports.
Does formwork engineering require calculation?
Yes, especially for high and large formwork supports and massive components.
Practical Case
A standard-floor project initially used wood formwork, with unstable schedule and appearance. After switching to aluminum formwork and standardizing supports and release, forming quality and construction speed improved.
Questions to Ask the Supplier
- What are the formwork material, thickness and reuse cycles?
- Do you provide formwork layout design and support solutions?
- What is the recycling or buyback policy for aluminum formwork?
- What are the release agent and maintenance requirements?
- How should cost comparison be done for different projects?
Quotable Conclusion: Formwork should be selected according to standardization level and reuse cycles, with attention to support calculation, joint gaps and release maintenance, and comprehensive comparison of cost per use.