nondestructive testing to identify concrete bridge deck

Nondestructive Testing to Identify

Concrete Bridge Deck Deterioration Nenad Gucunski – Rutgers University Herbert Wiggenhauser – BAM, Berlin Doria Kutrubes – Radar Solutions International Soheil Nazarian – University of Texas at El Paso

2012 AASHTO SCOBS Meeting

July 12, 2012, Austin, Texas

SHRP 2 R06-A

NDT for Bridge Decks - SCOBS 2012 NDT for Bridge Decks – SCOBS 2012

Project Objectives

1. To identify and characterize rapid NDT technologies for

concrete deck deterioration;

2. To evaluate strengths and limitations of NDT

technologies from perspective of speed, accuracy,

precision, and ease of use;

3. To validate promising technologies;

4. To recommend test procedures and protocols for most

effective application of NDT methods evaluated

5. To develop an NDT repository for practitioners.

SHRP 2 R06-A

NDT for Bridge Decks - SCOBS 2012

Traditional Methods of Deck Evaluation

SHRP 2 R06-A

NDT for Bridge Decks - SCOBS 2012 NDT for Bridge Decks – SCOBS 2012

Selection of Deterioration Types

Evaluation of NDT technologies was carried out based

on following four deterioration types:

• Corrosion

• Delamination

• Cracking, and

• Concrete degradation

SHRP 2 R06-A

NDT for Bridge Decks - SCOBS 2012 NDT for Bridge Decks – SCOBS 2012

Selection of Performance Measures

Performance measures selected for categorizing and

ranking of technologies:

• Accuracy,

• Repeatability,

• Ease of data collection, analysis and interpretation,

• Speed of data collection and analysis, and

• Cost of data collection and analysis.

SHRP 2 R06-A

NDT for Bridge Decks - SCOBS 2012 NDT for Bridge Decks – SCOBS 2012

Validation Testing

1. Field component

a. LTBP Program bridge in

Haymarket, VA (84 x 12 ft)

• Leveraging available “ground

truth” data

b. Concentrated on repeatability,

speed, ease of use of NDT

technologies.

c. Information regarding costs

associated with testing from

participants.

SHRP 2 R06-A

NDT for Bridge Decks - SCOBS 2012

Field Validation of NDT Technologies

SHRP 2 R06-A

NDT for Bridge Decks - SCOBS 2012

Field Validation of NDT Technologies

SHRP 2 R06-A

NDT for Bridge Decks - SCOBS 2012 NDT for Bridge Decks – SCOBS 2012

Validation Testing 2. Laboratory Component (UTEP)

a. 20x8 ft bare deck slab with a series of

defects/deteriorations (delamination,

vertical cracks, corrosion).

b. Section of a real bridge where

deterioration and defects determined

after testing through autopsies.

c. Concentrates on accuracy and

repeatability of NDT technologies.

SHRP 2 R06-A

NDT for Bridge Decks - SCOBS 2012

Summary Grades

SHRP 2 R06-A

NDT for Bridge Decks - SCOBS 2012 NDT for Bridge Decks – SCOBS 2012

NDToolbox

SHRP 2 R06-A

NDT for Bridge Decks - SCOBS 2012 NDT for Bridge Decks – SCOBS 2012

Content of Electronic NDT Toolbox

1. Summarized information on all recommended

methods for bridge deck evaluation, to obtain:

a. information about a particular NDT technique,

and

b. a prioritized list of NDT techniques for different

types of deterioration detection.

SHRP 2 R06-A

NDT for Bridge Decks - SCOBS 2012 NDT for Bridge Decks – SCOBS 2012

Content of Electronic NDT Toolbox

2. Documentation for recommended test procedures,

protocols, and available standards and guidelines,

3. Samples of data output, results presentation and

interpretation,

4. Equipment features, including cost, availability and

specifications,

5. Discussion regarding the implementation of the

provided information in inspection manuals and/or

management systems of transportation agencies.

SHRP 2 R06-A

NDT for Bridge Decks - SCOBS 2012 NDT for Bridge Decks – SCOBS 2012

Expanded NDT Toolbox for Transportation

Infrastructure Assets

Incorporated additional SHRP 2 projects:

1. R06B: Evaluating Applications of Field Spectroscopy Devices to Fingerprint Commonly Used

Construction Materials

2. R06C: Using Both Infrared and High-Speed Ground Penetrating Radar for Uniformity Measurement on

New HMA Layers

3. R06D: Nondestructive Testing to Identify Delaminations between HMA Layers

4. R06E: Real-Time Smoothness Measurements on Portland Cement Concrete Pavements During

Construction

5. R06F: Development of Continuous Deflection Device

6. R06G: Mapping Voids, Debonding, Delaminations, Moisture, and Other Defects Behind or Within Tunnel

Linings

SHRP 2 R06-A

NDT for Bridge Decks - SCOBS 2012 NDT for Bridge Decks – SCOBS 2012

Elements Needed for Successful

Implementation

• Presentation of the beneficial use of NDT

technologies and demonstration of the NDToolbox

as a resource tool.

• Continued support for maintenance and update of

the NDToolbox, as the new research, development

and technology validation results get available.

SHRP 2 R06-A

NDT for Bridge Decks - SCOBS 2012

Thank you!