Structures both new and old call for a wide variety of GPR frequency ranges to assess damage and integrity at a number of different resolutions. If you need to reach greater depths, you will need lower frequencies. Shorter depths may mean higher frequencies for higher resolution, which means a greater level of detail in radar data. A combination of frequencies is your best bet, which offers detail in resolution and depth. One frequency will give you one set of data, two frequencies will give you two sets of data, and so on. More frequencies allow you to interpret more accurately the information that a subsurface imaging device gives you.
For scanning concrete, often contractors will use high frequencies (typically around 2000 MHz) to get high resolution scans. Most concrete scanners do not go deeper than the initial layer of concrete.
US Radar has found a workaround for this. We have the only concrete scanner on the market with dual-frequency capability. This means you get the higher resolution scans that most other concrete scanners provide, but you get the added benefit of greater scan depths, allowing you to see beyond the initial concrete and provide more comprehensive structural assessment. This saves you the time and money of choosing between two frequencies and the ability to catch issues most other contractors would not.
Learn more about the Quantum Mini, world’s first and only dual-frequency handheld concrete scanner.
Bridge Deck Analysis
GPR is praised as the fastest, most non-destructive option in inspection and analysis of bridge decks. It is a useful tool as an initial look at what kinds of damage will need remediation.
Rebar corrosion and concrete degradation can be spotted with GPR scans, and these findings can be refined and confirmed with additional analysis such as testing chloride ion concentrations and extracting core samples. Without GPR, engineers often don’t know where to start coring or cutting in the first place!
Most often, rebar deterioration is the most common indicator of stress points in the bridge that need to be repaired. GPR data visualizes the deterioration of these points in contrast with materially intact rebar. Beyond percussive sounding and chain drag, GPR can be used to assess more specifically where rebar needs attention and to scope out the replacement of rebar and concrete properly.
With US Radar’s both the GPRover and the Quantum Imager, you get three frequencies in one, an unprecedented and exclusive offering of any GPR company in the world. Learn more about why three frequencies are better than one.
GPR can help you to locate:
- Concrete sparling
- Slab or wall thickness
- Asphalt layer thickness
Contact Us, let us know your upcoming projects and we will be happy to put together a radar system that’s perfect for your needs.