THE STATE-OF-THE-PRACTICE IN NORTH CAROLINA--PART II
This paper presents further comments on state-of-the-practice pavement drainage systems in North Carolina. Constructing a "V" or flat-bottom ditch with an independent grade helps drain water off a roadway section on a very flat area where the percent grade is almost zero and improves the overall drainage. Rigid pavement joints are normally sealed with hot-poured rubberized asphalt or preformed neoprene. With regard to underdrains and shoulder drains, North Carolina allows the contractor to select the kind of pipe to be used: corrugated steel, bituminous fiber, or concrete pipe. Concrete sand is used as subdrain fine aggregate material. Outlets are handled in one of three ways: the pipe is tied into some existing drainage structure; the pipe is extended through the slope and left sticking out, if it is a four-to-one slope or steeper on a fill; or miniature headwall is used in a shoulder section or a cut section, where the slope is four-to-one or flatter.
- This paper was presented at a workshop on water in pavements conducted in 1973 by the U.S. Federal Highway Administration in Memphis, Tennessee.
Washington, DC United States 20590
- Pace, L F
- Publication Date: 1973
- Pagination: p. 112-115
- TRT Terms: Bituminous materials; Concrete pipe; Corrugated steel; Ditches; Drainage; Drainage practices; Drainage structures; Fine aggregates; Flexible pavements; Joint sealers; Pavement cracking; Pavement joints; Pavements; Pipe; Rigid pavements; Road shoulders; State of the practice; Subdrains
- Geographic Terms: North Carolina
- Subject Areas: Design; Highways; Hydraulics and Hydrology; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I26: Water Run-off - Freeze-thaw;
- Accession Number: 00790775
- Record Type: Publication
- Files: TRIS, USDOT
- Created Date: Apr 30 2000 12:00AM