Assessing Corrosion of MSE Wall Reinforcement

Gerber, Travis M.; Billings, Daniel A.; Brigham Young University. Department of Civil and Environmental Engineering

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Assessing Corrosion of MSE Wall Reinforcement

2010-09-01
By Gerber, Travis M. ; Billings, Daniel A.

[PDF-4.13 MB]

English

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Details:

Creators:

Gerber, Travis M. ; Billings, Daniel A.

Gerber, Travis M. ; Billings, Daniel A. Less -
Corporate Creators:

Brigham Young University. Department of Civil and Environmental Engineering
Corporate Contributors:

Utah. Dept. of Transportation. Research Division
Subject/TRT Terms:

[+]

Corrosion Earth Walls Mechanically Stabilized Earth Mechanically Stabilized Earth Walls MSE Walls Retaining Walls
Publication/ Report Number:

UT- 10.20
Resource Type:

Tech Report
Geographical Coverage:

Utah
Edition:

Final; Apr. 2010-Sept. 2010.
Corporate Publisher:

Utah. Dept. of Transportation. Research Division
Abstract:

The primary objective of this study was to extract reinforcement coupons from select MSE walls and document the extent of corrosion. In doing this, a baseline has been established against which coupons extracted in the future can be compared. A secondary objective of this project was to develop and assess techniques for removal of coupons on two-stage MSE walls. Twenty-two wire coupons were extracted from MSE walls that are approximately 11 to 12 years old. Based on field observations, coupon galvanization appeared to be intact but exhibited a variable amount of white oxidation product. In some places the galvanization appeared to have flaked or spalled from the underlying steel, and a minor amount of localized steel corrosion was observed on several of such specimens. Based on laboratory acid-stripping tests, the average thickness of the galvanization on all of the extracted coupons currently exceeds the minimum value specified for the time of installation. Because the initial conditions are unknown, a reliable corrosion rate could not be determined using the direct measurement methods employed in this study. However, the data collected regarding current conditions can be used as baseline information going forward to compute corrosion rates in the future. No readily discernable difference in corrosion conditions as a function of distance away from the wall face was found. There was significance difference in the coupon pullout resistance between one-stage and two-stage MSE walls. The reasons for this behavior and their implications for design and performance should be investigated further.
Format:

PDF
Funding:

10-9262 ; work unit no. 5H06496H

10-9262 ; work unit no. 5H06496H Less -
Collection(s):

US Transportation Collection
Main Document Checksum:

[+]

urn:sha256:8671d050336f93bf1df9b3ebb4e0ea43e43df3e35acb8a1a40d3279f9eea40a6
Download URL:

https://rosap.ntl.bts.gov/view/dot/18479/dot_18479_DS1.pdf
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Assessing Corrosion of MSE Wall Reinforcement

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