United States Department of Transportation
i
Evaluation of drainage pipe by field experimentation and supplemental laboratory experimentation : interim report No. 1.
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1977-03-01
[PDF-2.84 MB]
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Abstract:Louisiana's Office of Highways reacts to a major problem when it attempts to shape and control drainage patterns along its right-of-ways. The Office's design engineers meet this challenge through proper section design and appropriate application of drainage structures.
Perhaps the most common structure that these design engineers use is the drainage pipe-primarily concrete and metal. This study is investigating the durability properties of metal drainage pipe in Louisiana, where durability of such pipe as important as strength because of harsh environs which promote corrosion.
Research and maintenance personnel of the Office installed ten types of metal drainage pipes at each of ten locations in 1973. Research personnel selected the test sites based on geographical location and on the pH and electrical resistivity values of the soil and effluent.
This interim report relates field and laboratory observations concerning the condition of the test pipes after two years of in-service exposure. It was found that the asbestos-bonded asphalt-coated galvanized steel pipe and the polyethylene-coated galvanized steel pipe are performing equally well and better than the other eight types of culverts in resisting corrosion. All of the coatings on the various test culverts are showing signs of failure at the highly corrosive test sites.
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