What is a concrete condition survey?
Concrete Condition Surveys are a valuable and positive instrument throughout the concrete structure risk management life-cyle. These surveys are generally undertaken to provide either:
- Accurate information upon the likely extent and type of concrete repair works that may be required.
- In-depth detailed information of how the concrete that forms a particular structure is performing
It is the case that through the early involvement of experienced concrete professionals that both potential repair and or maintenance regimes, budgets and specifications can be fundamentally shaped to provide detailed proactive practical assistance for the end-user. Concrete condition surveys generally fall into two categories:
- Non-intrusive visual/delamination survey.
- Detailed intrusive/ electro screening surveys.
Visual / Delamination Survey
Visual /delamination surveys are the most common type of concrete condition survey and are ideal to physically assess and identify deteriorated and damaged concrete surfaces such as cracking, spalling, rust staining, and the like. They are usually complemented using close-quarter careful hammer sounding testing to locate weak and hollow spots across the existing concrete surface. Physical defect details are recorded and referenced, and a quantified assessment of repair works can be established.
The survey can usually be carried out using traditional access techniques or through the use of drone technology.
Detailed intrusive / electro screening surveys
Detailed intrusive / electro screening surveys are commonly used to help better inform how the concrete forming the structure is performing. They are also used to help shape design and maintenance considerations. Ultimately offering accurate assessments of why a particular concrete element may be failing.
By their nature, these surveys are far more detailed than visual surveys and seek to use a combination of scientific and laboratory equipment and analysis. A detailed intrusive survey provides for the physical capture of concrete samples to carry out in-depth relevant tests for things like carbonation depth and chloride ion contamination. Specialist Electro screening or impulse radar scanning equipment provides for the accurate measurement of concrete cover to steel, bar layout and configuration. Half-cell potential and corrosion rate monitoring equipment can be used to determine the risk profile of reinforcing bar corrosion more accurately across a whole structure without the need to break away large areas of concrete to inspect that bar.
All of the above survey techniques can be readily carried out by our experienced teams here at Churchill Concrete Technology. Please feel free to contact our friendly team, we are here to help.