01005206

Component

https://doi.org/10.3141/1907-09

http://scholar.google.com...ouar&publication_year=2005

Ground-penetrating radar (GPR) is a nondestructive investigation tool that is usually used in flexible pavement evaluation to estimate the thicknesses of the various layers composing the pavement. GPR is also used in flexible pavements to detect subsurface distresses, such as moisture accumulation and air voids. For rigid pavements and bridge decks, GPR is used to measure the thickness of the concrete slab and detect the location of reinforcing bars (rebar). Rebar detection is typically achieved, in this case, when an experienced operator finds the rebar’s classic parabolic signature in the GPR data. This paper presents image-processing techniques that can be used to detect the rebar parabolic signature automatically in GPR data collected from rigid pavements with a high-frequency ground-coupled antenna. After detection of the rebar, the reflected parabolic shape is fit to a theoretical reflection model to estimate the pavement’s dielectric constant and the rebar depth. The algorithms were validated on GPR data collected from a known continuously reinforced concrete pavement section. The technique showed an average error of 2.6% on the estimated rebar cover depth.

01005195

English

pp 81-85

2005

Transportation Research Record: Journal of the Transportation Research Board

0309093791

Print

Figures (5) ; References (11)

Algorithms; Continuously reinforced concrete pavements; Dielectric properties; Ground penetrating radar; Image processing; Nondestructive tests; Reinforcing bars; Rigid pavements

Cover depth

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways

TRIS, TRB, ATRI

Oct 7 2005 9:47AM

• Changing the Shape and Location of Pavement Load Transfer Devices
• Computerized System for Efficient Scheduling of Highway Construction
• Design and Construction of a Full-Width, Full-Depth Precast Concrete Deck Slab on Steel Girder Bridge
• Development of a Test Method to Measure the Quality of Milling Operations in Asphalt Pavements
• Development of the Florida Department of Transportation's Percent Within Limits Hot-Mix Asphalt Specification
• Evaluation of Dowel Bars Installed in Airfield Concrete Pavement Construction Joints by Using Plastic Sleeves
• Experimental Investigations of the Effects of Multiple Heat Straightening Repair on the Structural Properties of Bridge Steels
• Forecasting Payments Made Under Construction Contracts: Payout Curves and Cash Management in the North Carolina Department of Transportation
• Improving Construction Communication
• Initial Ride Quality of Hot-Mix Asphalt Pavements
• Investigation of the CoreLok for Maximum, Aggregate, and Bulk Specific Gravity Tests
• Knowledge-Based Scheduling Analysis Software for Highway Rehabilitation and Reconstruction Projects
• Performance Testing of Segregated Hot-Mix Asphalt Samples to Evaluate Segregation Models
• Refinement of the Hot-Mix Asphalt Ignition Method for High-Loss Aggregates
• Risks with Multiple Pay Factor Acceptance Plans