CONCRETE JOINT SURVEY

RESULTS OF A STUDY OF SAWED-JOINT CONCRETE PAVEMENT IN COLORADO ARE PRESENTED. THE PERFORMANCE OF SAWED AND FORMED TRANSVERSE JOINTS ARE COMPARED. INFORMATION ON TIME OF SAWING THAT WOULD BE APPLICABLE TO THE IMPROVEMENT OF SAWED-JOINT SPECIFICATIONS IS DEVELOPED. DATA ON THE EFFECT OF JOINT SPACING, WELDED WIRE FABRIC AND BASE STABILIZATION ON PAVEMENT PERFORMANCE ARE PROVIDED. FIVE PROJECTS WERE INCLUDED. THE TEST PAVEMENT WAS 8 INCHES THICK, EXCEPT FOR A SINGLE 10-INCH THICK SECTION. THE MAJOR DESIGN FEATURES WERE' /1/ SAWED VERSUS FORMED TRANSVERSE JOINTS, /2/ TIME INTERVAL BETWEEN CONCRETE PLACEMENT AND JOINT SAWING, /3/ PLAIN VERSUS REINFORCED CONCRETE PAVEMENT. /4/ JOINT SPACING, /5/ DEPTH OF TRANSVERSE SAW CUT, AND /6/ THICKNESS OF CEMENT-TREATED SUBBASE. THE DESIGN FEATURES WERE PRIMARILY EVALUATED IN TERMS OF TRANSVERSE, LONGITUDINAL AND DIAGONAL CRACKING OF THE PAVEMENT SLABS. THIS EVALUATION CONSIDERED THE EFFECTS ON CRACKING OF SUCH FACTORS AS SOIL CHARACTERISTICS, CONCRETE MIX AND STRENGTH, AIR TEMPERATURE AND TRAFFIC DENSITY. SOME CONCLUSIONS DRAWN ARE' /1/ CONCRETE PAVEMENTS WITH SAWED JOINTS ARE AS RESISTANT TO CRACKING AS THOSE WITH FORMED JOINTS, /2/ PLAIN CONCRETE SLABS OF 25 FEET ARE AS RESISTANT TO CRACKING AS THOSE OF 20 FEET, /3/ OPTIMUM TIME FOR SAWING TRANSVERSE JOINTS IS FROM 12 TO 24 HOURS AFTER PLACEMENT OF CONCRETE, AND /4/ A 1 1/2- INCH DEEP SAW CUT APPEARS TO BE ADEQUATE FOR TRANSVERSE JOINTS IN 8-INCH THICK CONCRETE PAVEMENT.

  • Supplemental Notes:
    • Hpr-1/3/, BPR 10, STATE 1477
  • Corporate Authors:

    Colorado Department of Highways

    4201 East Arkansas Avenue
    Denver, CO  USA  80222
  • Publication Date: 1966

Subject/Index Terms

Filing Info

  • Accession Number: 00211995
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS, STATEDOT
  • Created Date: Jul 1 1994 12:00AM