Deterioration of reinforced concrete by corrosion of the reinforcing steel is the most frequent causative factor in maintenance, rehabilitation, or replacement of concrete structural elements. The ability to identify active corrosion in the early stages is of primary concern in minimizing the cost of corrosionrelated repairs.

Today's equipment is lighter, stronger, more durable, and is capable of interfacing with microcomputers through CADD like software. Additionally, with growing attention being paid to concrete substructure corrosion, this equipment solves some of the difficulties of surveying vertical surfaces over rivers, coastal waters, and freeways. Some tests that will be performed include the halfcell potential survey, delamination mapping, rapid field measuring, chloride content, concrete cover survey, rebar corrosion rates, and crack measurement.

The objective of this project is to demonstrate and document the latest concepts and test procedures for corrosion surveys on reinforced concrete structures. A secondary objective is to work in conjunction with States to collect data on structures that already have protective systems and to determine their effectiveness. The project is divided into three distinct modules:

1. Executive Presentation Slide presentation and some equipment demonstration.
2. Equipment Demonstration Slide presentation on bridge evaluation techniques and 1 to 2day equipment demonstrations.
3. Hands on Training and Testing, which includes three to four days of hands-on experience with equipment.

A loan program for States that are interested in a particular piece of equipment.

Several products developed under the Strategic Highway Research Program (SHRP) are being demonstrated as part of this project.

This project was announced late in 1991. DP-84 has been presented 36 times since then. Interested States may request demonstrations by contacting the project manager.

Not available.

---

HIGHWAYTECHNET   VIRTUAL EXPO   STRUCTURES INDEX

---

U.S. Department of Transportation
Federal Highway Administration