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Title:

Corrosion Process and Abatement in Reinforced Concrete Wrapped by Fiber-Reinforced Polymer

Accession Number:

01025417

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

The corrosion performance of steel reinforcement embedded in concrete samples encased by a coat of epoxy or a carbon fiber reinforced polymer (CFRP) wrap was investigated experimentally. Concrete samples were wrapped with one to three fabric layers impregnated with one of two different two-part epoxies. To accelerate corrosion, samples were subjected to an impressed current and a high salinity solution. Current flow measurements dynamically monitored corrosion activity during testing while corrosion induced reinforcement mass losses were measured following testing. Theoretical predictions of total mass loss, based on Faraday's law, were compared with actual corrosion mass loss values. A strong correlation between the predicted and actual corrosion mass loss values validated the use of theoretical estimates to examine the effect, over time, of CFRP wraps on the corrosion process. Test results indicated that CFRP wrapped specimens had prolonged test life, decreased reinforcement mass loss, and lower corrosion rates. The performance of wrapped specimens was superior to that of either control samples or those coated only with epoxy. Results indicated that the level of corrosion abatement provided by the CFRP wraps was influenced more by the type of epoxy used than the number of wrap layers. CFRP wraps when used to rehabilitate bridge foundations can not only provide an additional protective barrier to the concrete-encased steel bars by hindering the availability of corrosion agents but also confine the concrete, thereby delaying the onset of corrosion, retarding deterioration from cracking and spalling, and slowing the overall corrosion rate.

Monograph Accession #:

01020180

Report/Paper Numbers:

06-1801

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Wootton, Isaac A
Spainhour, Lisa K

Pagination:

14p

Publication Date:

2006

Conference:

Transportation Research Board 85th Annual Meeting

Location: Washington DC, United States
Date: 2006-1-22 to 2006-1-26
Sponsors: Transportation Research Board

Media Type:

CD-ROM

Features:

Figures (9) ; References (15) ; Tables (1)

Subject Areas:

Highways; Materials; I32: Concrete

Source Data:

Transportation Research Board Annual Meeting 2006 Paper #06-1801

Files:

BTRIS, TRIS, TRB

Created Date:

Mar 3 2006 10:47AM