You may have heard the term Delamination before, but not really know exactly what it means. Delamination refers to a kind of mechanical failure in composite materials and steel. It’s characterised by the separation of a material into subsequent layers, therefore no longer being one solid object, but rather multiple; ultimately resulting in an unusable material.
With the large usage of composite and steel materials within the construction industry, it’s a fair concern. Part of what makes delamination so worrying is how insidious it is, in that it is a failure that occurs within the material; rarely seen on the surface making diagnosing the defect sometimes quite difficult.
The phenomenon can be caused due to a number of reasons and the impact it can have on a project can be devastating. Delamination causes the effected material(s) to lose a great deal of their strength, making their presence in a structure virtually useless.
Some common causes for Delamination are:
It is essential to stay vigilant when any defects present themselves in general, but even more so in the case of composite materials, as delamination usually appears alongside most other defects that affect these materials.
Most often, the only way to solve an issue involving delamination will involve the reconstruction/replacement of the material(s) that have delaminated.
There are a few ways to diagnose whether something is being affected by delamination however, most methods are destructive and involve invasive methodology to make the determination. A few non-destructive methods of ascertaining whether a material is being affected are to listen to the acoustics of the material in question. This can be done with the use of speciality equipment, or by getting someone who is experienced to generate a sound from the material (usually by tapping it with a hammer), and determining if the sound that comes back is ‘hollow’.
Delamination is a defect that we often come across and solve here at BellMont. If you’re in need of any diagnostic or remedial consultation do not hesitate to contact us so we can help you resolve your issues.
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Enquiry after enquiry, inspection after inspection followed by spec after spec. These are the most common building defects our engineers have come across over seventeen years of business.
To learn more about these issues and how to identify them, you can head to the issues index of our site. Alternatively, if you think you’ve already identified these issues in your building and require our assistance, get in contact with us. We’d love to help get your building back in its best condition!
The Oscar on Hollywood is a multi level residential complex, consisting of two buildings located in Bondi Junction. The Owners have embarked on a large scale remedial project to remove all traces of concrete “cancer” and delaminating render and subsequently apply a three coat acrylic external grade paint coating system.
This project has also provided an ideal opportunity for the Owners to alter the colour schedule of the building and revitalise its appearance.
Bellmont is providing project and technical supervision services, ranging from detection and quantification of concrete/render repair volumes to paint application and adhesion testing of the applied coatings.
Paint adhesion tests are being undertaken utilising a pneumatic testing unit which measures the strength of the bond between the new paint and the host substrate.
Regular dry film thickness tests (DFT) of the paint coating are also being undertaken and recorded with the paint supplier in order to ensure correct coverage rates are being achieved.
The project is progressing well and is anticipated to continue for the majority of this year.