SALVAGING OLD PAVEMENTS BY RESURFACING

BEGINNING WITH 1949, ALL SALVAGED PAVEMENTS IN IOWA ARE BEING WIDENED TO 24 FT. AND, EXCEPT FOR HIGHWAYS PREVIOUSLY WIDENED IN ROADSIDE IMPROVEMENT PROJECTS, REGRADED TO PROVIDE 10-FT. SHOULDERS; VERTICAL CURVES AND ABRUPT ALIGNMENT ARE CORRECTED AND LOW GRADES RAISED. IN GENERAL, BRIDGES ARE WIDENED AND RAISED TO ADJUST TO CORRECTED GRADE LINES, AND CULVERTS ARE WIDENED TO CORRESPOND TO THE WIDENED SHOULDERS. TWO TYPES OF PAVEMENT WIDENING ARE USED, (1) ROLLED STONE TOPPED WITH ASPHALTIC CONCRETE AND (2) PORTLAND CEMENT CONCRETE. FORMS ARE USED ONLY WHEN PORTLAND CEMENT CONCRETE IS USED BOTH FOR WIDENING AND RESURFACING. THE PREDOMINANT TYPE OF RESURFACING USED THE PAST TWO SEASONS IS ASPHALTIC CONCRETE, BUT IN 1949, 21 MI. OF INTEGRAL WIDENING AND RESURFACING WITH PORTLAND CEMENT CONCRETE HAVE BEEN PLACED. FOR RESURFACING WITH ASPHALTIC CONCRETE, THE BINDER AND SURFACE COURSES ARE EACH 1 1/2 IN. THICK. THE DESIGN FOR REPLACING THE EXISTING PAVEMENT WHEN REMOVED (1) FOR FROST BOIL TREATMENTS IS APPROXIMATELY 30 IN. OF ROLLED STONE TOPPED WITH 1 1/2 IN. OF BLACK BASE PLUS BINDER AND SURFACE COURSE AND (2) FOR GRADE CHANGES AND RELOCATIONS IS 12 IN. OF ROLLED STONE TOPPED WITH 1 1/2 IN. OF BLACK BASE PLUS BINDER AND SURFACE COURSE. FOR INTEGRAL WIDENING AND RESURFACING WITH PORTLAND CEMENT CONCRETE, THE WIDENED SECTION IS 10 IN. DEEP AND THE DEPTH OVER THE EXISTING PAVEMENT VARIES FROM 6 TO 8 IN. ACCORDING TO THE OLD SLAB CONDITION. THE NEW PAVEMENT DESIGN ON GRADE CHANGES AND RELOCATIONS IS BASED ON 10-9-10-IN. THICKNESS. /AUTHOR/

  • Supplemental Notes:
    • Vol 29, pp 288-293
  • Authors:
    • Gould, V G
  • Publication Date: 1950

Media Info

  • Monograph Title: Proceedings of the Twenty-Ninth Annual Meeting of the Highway Research Board Held at Washington, D.C. December 13-16, 1949.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00218774
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Jul 25 1971 12:00AM