THE PREDICTION OF THE FREEZE/THAW DURABILITY OF COARSE AGGREGATE IN CONCRETE BY MERCURY INTRUSION POROSIMETRY

D-cracking is a serious problem of concrete pavements in freezing climates. The main cause of this distress is the coarse aggregate. Kaneuji (1) determined a correlation between the pore size distribution (from mercury intrusion) of an aggregate and the freeze-thaw durability of concrete using the same aggregate. He developed an Expected Durability Factor EDF, used to determine whether an aggregate can be expected to be durable or nondurable. The present study was designed to refine the validity of Kaneuji's correlation and better define the pore structure criteria by which to predict the performance of an aggregate. Aggregates from fifty-two Indiana highway cores were tested, as were five rock samples supplied by the Portland Cement Association. The EDF values were determined from the pore size distributions, and an "average" value was assigned to each pavement associated with the cores. These values were then compared with the field performance of the pavement to ascertain the borderline between EDF values for durable for nondurable aggregates. A good correlation between the field performance and the "average" EDF values was found. A pavement will be durable if its coarse aggregate has an EDF value greater than 50 for 90% or more of the aggregate. This criterion applies to stone and gravel aggregates with a maximum size of 1-1/2" to 2-1/2". The pavement will be durble for at least thirty years. (FHWA)

  • Corporate Authors:

    Purdue University/Indiana Department of Transportation JHRP

    Purdue University, School of Civil Engineering
    West Lafayette, IN  United States  47907-1284

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Lindgren, M N
  • Publication Date: 1980-10-1

Media Info

  • Pagination: 126 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00334461
  • Record Type: Publication
  • Report/Paper Numbers: JHRP-80-14 Intrm Rpt., FHWA/NJ-81/003
  • Contract Numbers: 1(18) Part II
  • Files: TRIS, USDOT
  • Created Date: Nov 23 1981 12:00AM