MAP CRACKING IN LIMESTONE-SWEETENED CONCRETE PAVEMENT PROMOTES D-CRACKING

A Portland cement-concrete pavement constructed in north central Kansas in 1963 showed map cracking near the sawed transverse joints by 1970. The pavement had been built using Republican River sand gravel, which is known to be reactive, and 30 percent Towanda limestone from near Milford, Kansas, had been added to the concrete mix as a sweetener to prevent the map cracking. The limestone did not prevent the map cracking, but was not otherwise involved in the deterioration that occurred before 1970. By 1972, however, after the surface near the joints was opened by the map cracking, the limestone aggetate particles become directly involved through the freeze-thaw deterioration type of the D-cracking. By 1974, deterioration was rapidly spreading outward from the transverse joints and blowups at the joints were requiring considerable repair. The synergistic effects of map cracking during the summer (with an average of 5000 degree hours, above 29.5 deg C (85 deg F)), and D-cracking during the winter (with more than 68 freeze-thaw cycles) promoted even more rapid deterioration and joint blowups. The progress of the deterioration was followed by the study of pavement cores obtained in 1970, 1972, and 1974. /Author/

Media Info

  • Media Type: Print
  • Features: References;
  • Pagination: pp 29-31
  • Monograph Title: Concrete, aggregates, marking materials, corrosion, and joint seals
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00183527
  • Record Type: Publication
  • ISBN: 0309026806
  • Files: TRIS, TRB
  • Created Date: Dec 12 1978 12:00AM