Technical Report Documentation Page FHWA/CA/TL-81/02 1. REPORT No. 2. GOVERNMENT ACCESSION No. 3. RECIPIENT'S CATALOG No. Cathodic Protection Studies on Reinforced Concrete 4. TITLE AND SUBTITLE March 1981 5. REPORT DATE 6. PERFORMING ORGANIZATION G.H.C. Chang, J.A. Apostolos, F.A. Myhres 7. AUTHOR(S) 19106 635355 8. PERFORMING ORGANIZATION REPORT No. Office of Transportation Laboratory California Department of Transportation Sacramento, California 95819 9. PERFORMING ORGANIZATION NAME AND ADDRESS 10. WORK UNIT No. F75TL10 11. CONTRACT OR GRANT No. California Department of Transportation Sacramento, California 95807 12. SPONSORING AGENCY NAME AND ADDRESS Final 13. TYPE OF REPORT & PERIOD COVERED 14. SPONSORING AGENCY CODE The study was conducted in cooperation with the U.S. Department of Transportation, Federal Highway Administration, under the project titled: "Develop and Evaluate Alternative Cathodic Protection Systems". 15. SUPPLEMENTARY NOTES This report presents field and laboratory studies relating to monitoring techniques, materials, and instrumentation used on reinforced concrete bridge decks under cathodic protection. It provides follow-up data on Sly Park Bridge, the first known deck to be placed under experimental cathodic protection, first reported in 1974. Effects of concrete temperature and moisture changes on potential measurements are documented and discussed. Use of an oscilloscope voltmeter, to avoid turning off the cathodic protection current is presented. Use of corrosometer probes, and isolated reinforcing bars as current and corrosion monitors is discussed. Impressed current anode data are presented. An attempt to develop a conductive concrete overlay using 100% coke as the aggregate is documented. High-silicon iron anodes were inspected after five years intermittent operation, and were found to be performing very well in a conductive layer of coke and asphaltic binder. Inspections and brief studies of mild steel, platinum coated, and copper anodes are also reported. 16. ABSTRACT Corrosion, concrete, bridge decks, cathodic protection, anodes, conductive concrete 17. KEYWORDS 96 18. No. OF PAGES: http://www.dot.ca.gov/hq/research/researchreports/1981-1988/catho_concrete.pdf 19. DRI WEBSITE LINK This page was created to provide searchable keywords and abstract text for older scanned research reports. November 2005, Division of Research and Innovation catho_concrete.pdf 20. FILE NAME

Technical Report Documentation Page - California Department of

Download PDF Report

Upload
others
View
0
Download
0

Embed Size (px)

Citation preview

Technical Report Documentation Page

FHWA/CA/TL-81/021. REPORT No. 2. GOVERNMENT ACCESSION No. 3. RECIPIENT'S CATALOG No.

Cathodic Protection Studies on Reinforced Concrete4. TITLE AND SUBTITLE

March 19815. REPORT DATE

6. PERFORMING ORGANIZATION

G.H.C. Chang, J.A. Apostolos, F.A. Myhres7. AUTHOR(S)

19106 6353558. PERFORMING ORGANIZATION REPORT No.

Office of Transportation LaboratoryCalifornia Department of TransportationSacramento, California 95819

9. PERFORMING ORGANIZATION NAME AND ADDRESS 10. WORK UNIT No.

F75TL1011. CONTRACT OR GRANT No.

California Department of TransportationSacramento, California 95807

12. SPONSORING AGENCY NAME AND ADDRESS Final13. TYPE OF REPORT & PERIOD COVERED

14. SPONSORING AGENCY CODE

The study was conducted in cooperation with the U.S. Department of Transportation, Federal Highway Administration, under theproject titled: "Develop and Evaluate Alternative Cathodic Protection Systems".

15. SUPPLEMENTARY NOTES

This report presents field and laboratory studies relating to monitoring techniques, materials, and instrumentation used onreinforced concrete bridge decks under cathodic protection. It provides follow-up data on Sly Park Bridge, the first known deck to beplaced under experimental cathodic protection, first reported in 1974.

Effects of concrete temperature and moisture changes on potential measurements are documented and discussed. Use of anoscilloscope voltmeter, to avoid turning off the cathodic protection current is presented. Use of corrosometer probes, and isolatedreinforcing bars as current and corrosion monitors is discussed. Impressed current anode data are presented. An attempt todevelop a conductive concrete overlay using 100% coke as the aggregate is documented.

High-silicon iron anodes were inspected after five years intermittent operation, and were found to be performing very well in aconductive layer of coke and asphaltic binder. Inspections and brief studies of mild steel, platinum coated, and copper anodes arealso reported.

16. ABSTRACT

Corrosion, concrete, bridge decks, cathodic protection, anodes, conductive concrete17. KEYWORDS

9618. No. OF PAGES:

http://www.dot.ca.gov/hq/research/researchreports/1981-1988/catho_concrete.pdf19. DRI WEBSITE LINK

This page was created to provide searchable keywords and abstract text for older scanned research reports.November 2005, Division of Research and Innovation

catho_concrete.pdf20. FILE NAME