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Title:

FIELD AND LABORATORY TESTING OF EPOXY-COATED REINFORCING BARS IN CONCRETE

Accession Number:

00627129

Record Type:

Component

Availability:

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Order URL: http://worldcat.org/issn/00978515

Abstract:

Corrosion of reinforcement in concrete exposed to chloride-contaminated environments is a common problem. If the corrosion process proceeds undetected, the safety of the reinforced concrete structures may be diminished. Therefore, information about the corrosion activity of reinforcing steel is essential. This paper presents the results of a study of the corrosion of epoxy-coated reinforcing steel in concrete exposed to chloride-contaminated environments using common test procedures including open-circuit potentials, linear polarization measurements, and AC impedance measurements. Testing was carried out both in the laboratory and in the field. Laboratory testing was accelerated in a simulated marine environment with four wetting and drying cycles each day using small-scale concrete slabs containing a single U-shaped epoxy-coated rebar. Corrosion activity was monitored continuously while specimens were exposed over a two year period. For field testing, concrete slabs containing U-shaped epoxy-coated reinforcing bars were placed at a natural marine environment exposure station in Treat Island, Maine. Electrochemical monitoring indicated that the corrosion rate of epoxy-coated rebar was negligible regardless of the degree of damage to the coating. Similarly epoxy-coated rebars removed from the slabs at the end of one and two years of exposure showed no propensity to cause cracking and spalling due to corrosion products and no visible signs of corrosion were found on the surface of concrete.

Supplemental Notes:

This paper appears in Transportation Research Circular No. 403, Epoxy-Coated Reinforcement in Highway Structures.

Monograph Accession #:

00627128

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Erdogdu, S
Bremner, T W

Pagination:

p. 5-16

Publication Date:

1993-3

Serial:

Transportation Research Circular

Issue Number: 403
Publisher: Transportation Research Board
ISSN: 0097-8515

Media Type:

Digital/other

Features:

Figures (9) ; References (16) ; Tables (4)

Uncontrolled Terms:

Corrosion rate; Marine environment; Rebars

Old TRIS Terms:

Subject Areas:

Bridges and other structures; Design; Geotechnology; Highways; Materials; I24: Design of Bridges and Retaining Walls; I34: Steels and Metals

Files:

TRIS, TRB

Created Date:

Mar 19 1993 12:00AM

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