PORTLAND CEMENT CONCRETE SHOULDER PERFORMANCE IN THE UNITED STATES (1965-1980)

During the 1960's and early 1970's several states constructed PCC shoulders to evaluate their performance and develop design standards. The earliest, and best documented of these projects include the Illinois projects of 1965, 66, 67, and 71; the Kentucky project of 1972; and the 1971 projects in Iowa, Michigan, Nebraska, Pennsylvania, and Texas. Principal variables included in these evaluation studies were thickness, pavement type (plain and reinforced), joint spacing, tie bars, and subbase. In 1973 a report, Highway Research Record 434, on the initial performance of these early pavements was prepared and presented to the Highway Research Board. The items discussed in this report included thickness, subgrade, longitudinal joint sealing, longitudinal joint key, tie bars, contraction joints, corrugated rumble strips, and reinforcement. Major conclusions of the report centered around design requirements and construction. At the time of this early study the PCC shoulders ranged in age from 0 to 7 years, with only three installations being over 2 years old. These shoulders are now a minimum of 7 years old, and the original Illinois installations have been in service for up to 15 years. The purpose of this paper is to report on the inspection and re-evaluation of these PCC shoulders. A comparison of both the conclusions of the 1973 report and an evaluation of current design practices based on 15 years of experience has been made. Recommended modifications to current design practices indicated by the current study findings are included. (Author)

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 331-341

Subject/Index Terms

Filing Info

  • Accession Number: 00334264
  • Record Type: Publication
  • Report/Paper Numbers: Proceeding
  • Files: TRIS, USDOT
  • Created Date: Sep 16 1981 12:00AM