What is GPR

About GPR:

GPR is a radar–based technology that uses antennas to transmit and receive pulses of electromagnetic energy through concrete. As the radar receives the transmitted pulses it registers “echoes” from the objects based on their different electromagnetic conductivity. In addition to the GPR, our Scanners are equipped with a Power Cable Detector that can detect current carrying conduits.
Ground Penetrating Radar has been widely used in the geological and archaeological industries since the 70's. Since then the applications for GPR have rapidly moved into the construction industry. The portability and ease of operation of today's GPR systems allows technicians to move around a job site safely and efficiently. With GPR technology we are able to locate post tension cables, reinforcing bar and electrical conduits, discover voids and measure slab thickness. This accurate, non-invasive technology is producing enormous savings in the construction, engineering, and maintenance fields
To put it simply, Ground Penetrating Radar shows you what is on the inside. As our scanner moves slowly over a concrete floor, wall, beam or any other non-conductive surface the scanners three antennas send a safe ultra wide spectrum of RF energy pulses through that medium and back to the antenna to create an image of the subsurface on the operator interface.
The scanner uses the same basic principles as a metal detector. A metal detector sends energy into the earth in up to 17 frequencies. When that energy meets a metallic object, it is translated into a recognizable tone. The scanner sends out thousands of frequencies that return to the antenna and translate material composition definition in the subsurface.
Radar is sensitive to changes in material composition. Detecting these changes requires movement. In the case of air traffic control radar, the targets are moving, so a stationary transmitter works. In the case of GPR, we are looking for stationary targets, so it is necessary to move the radar to detect the target.

Benefits of Ground Penetrating Radar:
  • Non-Destructive: Frequency waves inflict absolutely no damage on the subsurface, environment or surrounding people.

  • Disturbance-Free: Makes little noise and doesn’t bother surrounding people during use.

  • Easily Deployed: Multiple size options that are user friendly, so it can be stored, moved and utilized almost anywhere with few limitations.

  • Rugged: Entire construction is extremely durable and designed to endure the everyday riggers associated with its suitable applications.

GPR Applications:

Locating rebars, tendons, metal and plastic conduits, glass-fiber cables, voids and wood in dry concrete structures at depths of up to 18".
Minimizing the risk of hitting concealed objects when drilling anchor holes
Reduce risk of costly electrical or structural repairs prior to core drilling or concrete sawing and breaking
Rebar extension (post-installed rebar connections) in structural applications.
Structural inspection of floors, decks, slabs, balconies, etc. in such structures as tunnels, bridges and buildings
Non-destructive inspection and detection of concealed objects in steel-reinforced and pre-stressed concrete structures

Detecting metal or plastic pipes and electric cables to help avoid damage when drilling

Locating reinforcing steel bars for post-installed steel reinforcing

Butler Scanning

738 E. Park Avenue,

Libertyville, IL 60048

Phone. 847-855-6015

Fax. 847-855-6020

Email. jbutler@butlercoring.com

Butler Scanning

707 North Third St.,

Suite 203,

Minneapolis, MN 55401

Phone. 612-402-7766

Email. jbutler@butlercoring.com