Ground Penetrating Radar

Ground Penetrating Radar (GPR) is one of the most specialized and cost-effective inspection methods for the subsurface condition of pavements and bridge decks. Rii has been using GPR since 2002 and has utilized this technology across the country.

Get Comprehensive Results

Results typically provide information on bridge deck condition, pavement layer structure, joint conditions, and void areas under the pavements. GPR gives solutions for bridge and pavement rehabilitation projects with information supplied after testing, analysis, and evaluation. It offers positive and accurate delineation of deteriorated boundaries for reinforced bridge decks, accurate and quick confirmation of asphalt overlay measurements, and identification of rebar depth and spacing. GPR can be used to study pavement layer thicknesses, find voids under pavement, evaluate moisture or density variations, detect asphalt stripping zones, and assess the condition of concrete pavements.

Rii maintains the latest equipment and technologies needed to perform the analysis, testing, and evaluation of street and highway pavements and bridge decks. Surveys are performed with multiple scans so that 100% complete structure coverage is obtained. Depending on the objective of the survey, an appropriate antenna(s) is selected to best obtain the desired information in an efficient and economic fashion.

Get Comprehensive Results

Results typically provide information on pavement layer structure, joint conditions, subbase erosion and void spaces under slabs. GPR provides solutions for problem cost overruns of bridge and pavement rehabilitation projects; unconfirmed overlay thicknesses; and is extremely cost effective when combined with traditional coring and laboratory testing techniques. It provides positive and accurate delineation of deteriorated boundaries for reinforced bridge decks; accurate and quick confirmation of asphalt overlay measurements; and identification of rebar deterioration and delaminations.

Rii maintains the latest equipment and technologies needed to perform the analysis, testing, and evaluation of street and highway pavements and bridge decks. Surveys are performed with multiple scans so that 100% complete structure coverage is obtained. Depending on the objective of the survey, an appropriate antenna(s) is selected to best obtain the desired information in an efficient and economic fashion.

Infrastructure Applications

GPR is used for the nondestructive evaluation (NDE) and non-destructive testing (NDT) of the following:

  • Bridge Decks
  • Asphalt and Concrete Pavements
  • Vertical Concrete Structures
  • Subsurface Soil Investigations

Using GPR with IR

Ground penetrating radar is a well-established and accepted inspection method for accurately assessing the condition of reinforced concrete structures, while Infrared Thermography (IR) is a valuable and cost-effective method for locating concrete delamination/debonding in concrete bridge decks. The combination of IR and GPR is very powerful, maximizing the capabilities of each method and compensating for the limitations. Together, they offer a high degree of accuracy in locating deteriorated and debonded areas and provide a great deal of confidence in the overall deteriorated quantities.

Using GPR with IR

Ground penetrating radar is a well-established and accepted inspection method for accurately assessing the condition of reinforced concrete structures, while Infrared Thermography (IR) is a valuable and cost-effective method for locating concrete delamination/debonding in concrete bridge decks. The combination of IR and GPR is very powerful, maximizing the capabilities of each method and compensating for the limitations. Together, they offer a high degree of accuracy in locating deteriorated and debonded areas and provide a great deal of confidence in the overall deteriorated quantities.

Geophysical Services

We have used GPR for client projects across the nation from New York to California performing pavement condition, geophysical services, and structure condition surveys for their capital improvement projects. Various applications of GPR include:

Bridge Deck Assessment

Continuous Pavement Layer Measurements

Pavement Structure Evaluation

Concrete Structural Inspection

Rebar Depth Profile

Post Tension Cable and Rebar Locating

Utility Locating

Grave Site Locating

Underground Storage Tank (UST) Locating

Other Non-Destructive Evaluation Services

Rii provides many comprehensive NDE services to help you evaluate your infrastructure and facility assets. Click here to learn more about the innovative technology we use to facilitate NDE services, and click here to learn more about Rii’s specialized Pavement Engineering services.

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