Field Evaluation of Corrosion of Reinforced Concrete Structures in Marine Environment

Newtson, Craig M.; Bola, Mereoni M. B.

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Field Evaluation of Corrosion of Reinforced Concrete Structures in Marine Environment

2000-06-01
By Newtson, Craig M. ; Bola, Mereoni M. B.

File Language:

English

Details

Creators:

Newtson, Craig M. ; Bola, Mereoni M. B.
Corporate Creators:

University of Hawaii at Manoa. Department of Civil and Environmental Engineering
Corporate Contributors:

United States. Department of Transportation. Federal Highway Administration ; Hawaii. Department of Transportation. Highways Division
Subject/TRT Terms:
Publication/ Report Number:

UHM/CE/00-01
Resource Type:

Research Paper
Geographical Coverage:

Hawaii
Corporate Publisher:

University of Hawaii at Manoa. Department of Civil and Environmental Engineering
Abstract:

Eight sites were selected for field evaluation in cooperation with the Harbors Division of the Hawaii Department of Transportation. Seven of the sites used a calcium nitrite based admixture as a corrosion inhibitor. The eighth site used epoxy coated reinforcing steel to combat corrosion. Each site was tested for permeability, chloride ion concentration, half-cell potential, polarization resistance, resistivity, and pH. Corrosion activity identified by the half-cell potential measurements, polarization resistance measurements, and visual inspection of bars taken from cores indicated that high dosages of calcium nitrite (4.0 to 4.5 gal/yd³) provided the steel with significantly greater protection than lower dosages (2.5 gal/yd³). Visual inspection of epoxy coated bars taken from cores also demonstrated that the epoxy coating effectively protected the steel. Resistivity measurements often contradicted the results from the half-cell potential and polarization resistance tests. However, visual inspections supported the half-cell and polarization resistance tests, indicating that the resistivity measurements were erroneous.
Format:

PDF
Download URL:

https://rosap.ntl.bts.gov/view/dot/60268/dot_60268_DS1.pdf
File Type:

[PDF - 5.53 MB]
Collection(s):

US Transportation Collection
Main Document Checksum:

urn:sha-512:abbb8ce4d5f13031cdadb70f8d76a457d724be67aeb09a6a6161939d3cf3618f4516fd3a012185dfadcfe0ceeb6f554774237c7f54c989082f205b460cf23e95

File Language:

English

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