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The National Academies

NCHRP Synthesis 20-05/Topic 25-21 [Final (Synthesis)]

Service Life of Drainage Pipe
[ NCHRP 20-05 (Synthesis of Information Related to Highway Practices) ]

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This synthesis will be of interest to state department of transportation (DOT) highway and roadway design and materials engineers, including specifications and standards, geotechnical, chemical, pavement, construction, and maintenance specialists; engineering geologists and geologists; product manufacturers and suppliers; and researchers. The synthesis describes the current state of the practice regarding state transportation agency standards and strategies that determine and define the service life of drainage pipe. Information for the synthesis was collected by surveying state transportation agencies and by conducting a literature search. This report of the Transportation Research Board is an update of NCHRP Synthesis 50: Durability of Drainage Pipe (1978). The synthesis provides detail on the elements influencing material durability considered in the selection of drainage pipe. These elements include the definitions of useful service life and life expectancies of various types of pipe protection systems in differing environments based on such facts as pH, resistivity, abrasion, flow conditions, etc. Protection strategies that influence material durability are also addressed. The report for this topic can be purchased at http://www.trb.org/news/blurb_detail.asp?id=3303

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