SUMMARY OF WORKSHOP SESSION ON RIGID PAVEMENTS--MEMPHIS, TENNESSEE
This paper summarizes the session on rigid pavements held at the Federal Highway Administration workshop on Water in Pavements in Memphis, Tennessee, in 1973. The discussion on rigid pavements started with an attempt to basically define the pumping problem in rigid pavements. There are three elements necessary to cause pumping: traffic, an erodible material, and a source of water. The session centered around surface water--that infiltrating into the pavement section from above. Participants reviewed the current practices of the various states with regard to identifying a nonerodible subbase material. Cement-treated subbases were commonly used; a number of states used a cement-treated subbase with a hot-mix asphaltic concrete over it. The most critical area in a rigid pavement is the longitudinal joint at the pavement/shoulder interface. The edge pumping at this interface seems to be more of a problem than the pumping of transverse joints. All rigid pavements should include some kind of drainable system. Continuous longitudinal drains and permeable should drain sections were discussed. A proposal surfaced of using a nonvertical pavement edge at the longitudinal shoulder interface. Attendees felt that this system could be constructed using slip-form paving technology. The economics of the drainage system should be a part of the economics of the total system. A number of people saw continuously reinforced concrete pavement (CRCP) as the end to joint problems and pumping problems; but drainage must be considered, even for CRCP.
- This paper was presented at a workshop on Water in Pavements sponsored by the Federal Highway Administration, held in Memphis, Tennessee, in 1973.
Washington, DC United States 20590
- Pace, L F
- Publication Date: 1973
- Pagination: p. 120-123
- TRT Terms: Asphalt concrete pavements; Cement treated soils; Continuously reinforced concrete pavements; Drainage; Drains; Economics; Hot mix asphalt; Infiltration; Longitudinal joints; Moisture content; Pavement joints; Pavements; Pumping (Pavements); Rigid pavements; Road shoulders; Subbase (Pavements); Subbase materials; Transverse joints; Water; Workshops
- Subject Areas: Design; Economics; Geotechnology; 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: 00792243
- Record Type: Publication
- Files: TRIS, USDOT
- Created Date: May 3 2000 12:00AM