How to Inspect Concrete Formwork
Concrete formwork should always be properly inspected before use. This is the case whether you’ve utilized the formwork for previous projects or whether you have recently bought it used or new from a seller. It’s a good idea to routinely inspect it if it’s in storage and you plan to re-use it, especially if it’s been in storage for any significant period of time. Using concrete forms that have not been well-maintained and that are damaged in any way can compromise the success and safety of a project. Inspecting concrete formwork is a relatively simple process. Below are some suggestions for thorough and proper inspection:
1. Look for excessive rust and corrosion.
Pre-engineered steel and aluminum forms are generally pretty tough against rust and corrosion, but you should still keep an eye out for any excessive rust and corrosion that may compromise the quality of the formwork. Excessive rust can, among other things, lead to rust stains on concrete structures during the forming process. As a part of your maintenance of your formwork, you should do the most you can to help prevent rust and corrosion by storing forms in protected, covered locations.
2. Check for warping or bent forms.
Warping or any bent areas are major red flags that need to be addressed before formwork is used. If using timber formwork, make sure the wood is not chipped, tearing, or rotting in any areas. Warped, bent, or otherwise damaged sections of formwork should be repaired or replaced to ensure the integrity of future concrete structures.
3. Keep an eye out for concrete residue.
Concrete residue should be cleaned off after each use of formwork. That being said, sometimes it’s easy to miss a little bit of residue. Before formwork is used again, it’s a great idea to inspect it for any leftover residue. Any and all residue should be adequately removed before formwork is installed and before cement is poured.
4. Inspect for wear and tear and other damage from prolonged storage.
Ideally, when formwork isn’t in use, it should be stored in a covered area so it’s protected from the elements. If, for some reason, it’s not stored in a covered area, make sure you inspect it for weather-related damage on a regular basis and consider storing it in a more protected area if it’s out of use for long periods of time (if possible). Even if it is housed in a covered or enclosed area, it’s a good idea to check on it in storage on a routine basis to make sure it hasn’t picked up any new damage or wear and tear.
5. Assess whether it needs some extra oiling up.
Release agents should be used on formwork before and after each use. If it’s out of use for a while, a part of your routine inspection should be to assess whether more release agent should be applied if needed. This may be the case if it has been in storage for a long period of time.
Inspection of concrete formwork will differ on a case-by-case basis depending upon the type of formwork involved, but the recommendations above are useful for most types of forms. Routine inspection can be an invaluable part of your maintenance of formwork and can ultimately extend its longevity, allowing you to get the most value out of your concrete formwork in the long run.
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