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What
can GPR do for me?
- Identify location,
square footage, and percentage of deteriorated concrete within reinforced
concrete bridge decks. More information...
- Provide accurate
and quick asphalt or concrete overlay measurements. More
information...
- Utility location
in vertical walls or under concrete/asphalt/soil surface.
- Infrastructure
investigation into rebar depth, slab thickness or air voids that may
be present underneath surface.
- Better locating
and minimization of core sampling or secondary sampling methods.
- Minimize cost overruns
with construction and maintenance planning.
- Railway Track substructure
includes determination of presence/absence of layer interface "fouling,"
trapped water, layer thickness and buried utilities. More
information...
- Aviation Facility
Inspection includes rebar depth determination, utility location and/or
air void determination
for aprons, runways and hangers. More information...
GPR
as a Planning Tool
GPR can provide superior
Planning Data in:
High-Resolution
GPR for Bridge Deck Evaluation
Ground-penetrating radar (GPR) is used for to map the concrete condition
of aging bridge deck structures by measuring dielectric properties of
the material, signal attenuation throughout the deck thickness, and reinforcement
reflection amplitude. With this approach GPR has an ability to accurately
estimate total deterioration quantity (expressed as % of total deck area)
that would be removed during an improvement process. Back
to applications.
 
The above GPR scan shows the top layer of reinforcement on a bridge deck.
The blue areas have strong reflections that are consistent with good concrete.
The red areas have weak reflections consistent with poor/delaminating
concrete. The yellow area is in a transitional state from good concrete
to poor. The resulting core samples are shown with their GPR reflective
values. Back
to applications.
High-Speed GPR for Pavement
Evaluation
Common
Pavement evaluation applications include:
- Overlay thickness
of asphalt (flexible) or concrete (rigid) pavement.
- Investigation into
surface cracking or other distresses.
- Locating rebar
or other subsurface features within a roadway.
- Determination of
the lateral extent of lane pavements before the alteration of shoulder
pavement during a lane-widening operation.
- Determination of
pavement condition, along with pavement substructure.
- Measurement of
new asphalt pavement compaction as a Quality Assurance indicator.
Back to applications
Aviation
Facility Inspection
Shown below are surface distresses were noticed on airport runway pavements.
GPR was used in conjunction with Falling Weight Deflectometer (FWD) to
determine the presence of air voids under 22” of concrete.
Back
to applications
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