STUDY OF D-CRACKING IN PORTLAND CEMENT CONCRETE PAVEMENTS. VOLUME 2--LABORATORY PHASE

Thirty locations were chosen from the pavements surveyed for the Field Phase Report. Cores were taken and tested for compressive and tensile strength, core density, and freeze-thaw durability. Also, laboratory concretes with variables of aggregate type and size, and water to cement ratio were tested for freeze-thaw durability by ASTM C-666 method A. Laboratory water penetration tests on newer pavement concretes, a dried aggregate field test section, and a condition comparison of adjacent pavement with and without traffic were made. Some observations and conclusions made: D-crack deterioration did not relate to concrete density or strength; air-entrained field concretes were the most freeze-thaw durable; in our tests smaller aggregate size did not relate to better freeze-thaw durability; heat drying the aggregate was not beneficial; pavement cores showed high water penetration; traffic promotes ravelling of D-crack surfaces but is not necessary for its occurrence.

Media Info

  • Pagination: n.p.

Subject/Index Terms

Filing Info

  • Accession Number: 00334462
  • Record Type: Publication
  • Report/Paper Numbers: FHWA-KS-81-2 Intrm Rpt.
  • Contract Numbers: Study 65-2A
  • Files: TRIS, USDOT, STATEDOT
  • Created Date: Nov 23 1981 12:00AM