SPACING OF UNDOWELED JOINTS IN PLAIN CONCRETE PAVEMENT

IN 1955 THE IOWA STATE HIGHWAY COMMISSION CONSTRUCTED APPROXIMATELY 16 MI OF EXPERIMENTAL PORTLAND CEMENT CONCRETE PAVEMENT CONTAINING SECTIONS WITHOUT CONTRACTION JOINTS AND SECTIONS IN WHICH THE JOINTS WERE SAWED AT 20, 50 OR 80 FT. NONE OF THE JOINTS WERE DOWELED. APPROXIMATELY HALF OF THE JOINTS WERE LEFT UNSEALED. AFTER 8 YR OF SERVICE THE PAVEMENT TEST SECTIONS HAVE AN AVERAGE SLAB LENGTH OF FROM 19 TO 37 FT. FAULTING OF AT LEAST 1/16 IN. IS EVIDENT AT 70 PERCENT OF THE JOINTS SPACED AT 20 FT. THE INCIDENCE OF FAULTING IS GREATER FOR THE JOINTS SPACED AT 50 AND 80 FT. MEASUREMENTS MADE IN APRIL 1964 REVEALED THAT MORE THAN 92 PERCENT OF THE JOINTS WERE OPEN AT LEAST 1/16 IN. MORE THAN THEIR ORIGINAL SAWED WIDTH OF 1/8 IN. THE EFFECT OF JOINT SEALING WAS NOT CONCLUSIVE, BUT IT APPEARS THAT THE SEAL MAY HAVE BEEN USEFUL IN KEEPING DEBRIS OUT OF THE JOINTS SPACED AT 20 FT. /AUTHOR/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 46-54
  • Monograph Title: Concrete pavement design
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00205331
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Nov 10 1994 12:00AM