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https://nap.nationalacademies.org/catalog/27432/critical-issues-in-transportation-for-2024-and-beyond

D-CRACKING OF CONCRETE PAVEMENTS IN OHIO

A THREE-PHASE PROGRAM WAS UNDERTAKEN TO DEVELOP DATA ON THE EXTENT AND SEVERITY OF D-CRACKING OF CONCRETE PAVEMENTS IN OHIO, THE INFLUENCE OF SUBSURFACE DRAINAGE AND PAVEMENT DESIGN AND THE ROLE OF MATERIAL PROPERTIES ON THE DEVELOPMENT OF D-CRACKING, AND THE VERIFICATION OF FACTORS FOUND TO BE OF SIGNIFICANCE. IN THIS PROJECT, D-CRACKING REFERRED TO A SERIES OF CLOSELY SPACED CRACKS THAT APPEARED AT A PAVEMENT WEARING SURFACE ADJACENT AND SUB-PARALLEL TO TRANSVERSE AND LONGITUDINAL JOINTS AND CRACKS, THE FREE EDGES OF PAVEMENT SLABS, AND ALSO TO ASSOCIATED CRACKING PRELIMIMARY TO THAT APPEARING AT THE WEARING SURFACE. THE METHODOLOGY FOR ACHIEVING THESE OBJECTIVES INCLUDED FIELD SURVEYS OF ALL EXISTING EXPOSED CONCRETE PAVEMENTS, A LABORATORY STUDY SUPPLEMENTED BY OUTDOOR EXPOSURE TESTS, AND THE CONSTRUCTION OF A FULL-SCALE TEST ROAD. THE FIELD SURVEY WORK IS ESSENTIALLY COMPLETED AND THE LABORATORY AND OUTDOOR EXPOSURE WORK IS WELL ADVANCED. CONSTRUCTION OF THE FULL-SCALE TEST ROAD HAS BEEN DELAYED. APPROXIMATELY 4,400 LANE MILES OF PAVEMENT HAVE BEEN SURVEYED. SUMMARIES OF DATA HAVE BEEN PREPARED FOR ALL PAVEMENT SURVEYED, EXCLUDING THE INTERSTATE ROUTES. SIGNIFICANT FINDINGS AND CONCLUSIONS ARE AS FOLLOWS: (1) DATA FOR OTHER THAN INTERSTATE ROUTES INDICATE THAT (A) OLDER PAVEMENTS SHOW MORE D-CRACKING THAN YOUNGER PAVEMENTS, (B) ABOUT 20 PERCENT OF THE MILEAGE SHOWS 80 PERCENT OR MORE OF THE JOINTS AFFECTED BY D-CRACKING, (C) THE MAJOR PORTION OF THE UNAFFECTED PAVEMENTS ARE LESS THAN 10 YEARS OLD, AND (D) APPROXIMATELY 66 PERCENT OF THIS MILEAGE HAD RATINGS OF 0.0 OR 1.0 (NONE OR LOWEST AMOUNT OF D-CRACKING) AND 7 PERCENT HAD RATINGS GREATER THAN 2.0 (THE MAXIMUM RAGING WAS 5.0). (2) A LABORATORY STUDY OF CORES FROM D-CRACKED PAVEMENTS IN OHIO POINTS TO THE IMPORTANCE OF ENVIRONMENT AND ITS IMPACT ON AVAILABILITY OF MOISTURE AND TO THE PHYSICAL PROPERTIES OF THE AGGREGATE. ENTRAINED AIR ADEQUATELY PROTECTED THE CEMENT PASTE MATRIX, BUT WAS NOT ABLE TO PROTECT THOSE AGGREGATES INVOLVED IN D-CRACKING. (3) POSITIVE CONNECTIONS BETWEEN TILE SUBDRAINS AND PAVEMENT SUBBASE DID NOT APPEAR TO PREVENT THE OCCURRENCE OF D-CRACKING, BUT DID APPEAR TO REDUCE ITS RATE OF DEVELOPMENT. (4) A FEW AGGREGATE SOURCES SHOW EVIDENCE OF ALKALI CARBONATE REACTIVITY. (5) THE CRITICAL DILATION FREEZING AND THAWING TEST PROCEDURE DOES NOT APPEAR TO BE A USEFUL INDICATOR OF THE POTENTIAL FOR D-CRACKING. (6) RAPID FREEZING AND THAWING TESTS OF AIR-ENTRAINED CONCRETE IN WATER APPEAR TO CORRELATE WELL WITH AGGREGATE SERVICE RECORD. (7) LABORATORY FREEZING AND THAWING TESTS OF AIR-ENTRAINED CONCRETES WITH OHIO AGGREGATES HAVE SHOWN CONCLUSIVELY THAT REDUCING THE MAXIMUM SIZE OF THE COARSE AGGREGATE SIGNIFICANTLY INCREASES THE DURABILITY OF POOR AGGREGATES. (8) FREEZING AND THAWING TESTS OF SINGLE PARTICLES OF AGGREGATE ENCASED IN AIR-ENTRAINED MORTAR SHOW PROMISE OF GOOD CORRELATION WITH AGGREGATE SERVICE RECORD. (9) A RELATIVELY SIMPLE, INEXPENSIVE, AND SHORT-TIME TEST EVALUATING THE ABSORPTION AND ADSORPTION PROPERTIES OF AN AGGREGATE APPEARS TO BE A RELIABLE INDICATOR OF THE POTENTIAL FOR D-CRACKING. (10) A RELATIVELY INEXPENSIVE MOISTURE GATE, BASED ON THE EFFECT OF CHANGES IN MOISTURE CONTENT OF A MATERIAL ON THE THERMAL CONDUCTIVITY OF THE MATERIAL, HAS BEEN DEVELOPED FOR USE IN MONITORING SEASONAL CHANGES IN MOISTURE CONTENT OF CONCRETE PAVEMENTS AND BASES. /AUTHOR/

  • Supplemental Notes:
    • APP
  • Corporate Authors:

    Portland Cement Association

    Cement and Concrete Research Inst
    ,   United States 
  • Authors:
    • Verbeck, G
    • Klieger, P
    • Stark, D
    • Teske, W
  • Publication Date: 1972-3

Media Info

  • Features: Figures; Tables;
  • Pagination: 132 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00224324
  • Record Type: Publication
  • Report/Paper Numbers: Int Rept
  • Files: TRIS
  • Created Date: Apr 3 1974 12:00AM