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Title	Corrosion in an Arid Environment and Condition Assessment of 20-Year-Old Metallically Stabilized Earth Walls
Accession No	01025659
Authors	Fishman, Kenneth L ; Salazar, John Mark ; Hilfiker, Harold K
Conference Title	Transportation Research Board 85th Annual Meeting
Corp. Authors / Publisher	Transportation Research Board
Publication Date	20060000
Description	14p; Figures(4); References(13); Tables(1)
Media Type	CD-ROM
Languages	English
Abstract	Advanced corrosion was observed for three metallically stabilized earth (MSE) walls that were constructed in 1985 in Las Vegas, Nevada. The wall backfill was reinforced with plain steel welded wire fabric (WWF) manufactured from cold-drawn wire. Data presented in this paper suggest that elevated levels of corrosion may be attributed to the aggressiveness of the backfill used on this project, which had characteristics typical of soil and aggregates native to an arid environment. Metal loss and corrosion rate were observed from measurements made on samples exhumed from test pits, and from linear polarization resistance (LPR) measurements on in-service reinforcements. If the aggressiveness of the backfill is recognized, the observed corrosion rate is predictable and consistent with estimates of metal loss from mathematical models of service life, and observations available in the literature describing the performance of plain steel reinforcements at other sites. A reasonable comparison between direct physical observation and corrosion monitoring with nondestructive testing (LPR) was observed. This further demonstrates that nondestructive testing with LPR provides a means to evaluate the condition of MSE walls and observe elevated levels of corrosion.
TRT Terms	Backfill soils ; Corrosion ; Earth walls ; Reinforcement (Engineering) ; Soil stabilization
Subject Areas	H62 FOUNDATIONS (SOILS); I42 Soil Mechanics
Report Number	06-1308
Availability	Transportation Research Board Business Office Order Document: http://trb.org/news/blurb_detail.asp?id=1121
URLs	Order: http://pubsindex.trb.org/orderform.html
Document Source	Source Data: Transportation Research Board Annual Meeting 2006 Paper #06-1308
TRIS Files	HRIS; BTRIS
Database	TRIS Online

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