NEW JERSEY'S THICKNESS SPECIFICATION FOR BITUMINOUS PAVEMENT

The New Jersey Department of Transportation has developed a statistically based, end result type specification for thickness of bituminous concrete pavement. The specification requires decisions on acceptability to be made for each bituminous paving item (surface, binder, and stablized base) separately and on a lot by lot basis. A lot is established as approximately 15,000 square yards of paving item. An acceptable lot is one having a quality level of thickness equal to or better than that obtained on past projects. The methods used to determine lot acceptability are patterned after the variability unknown procedures of Military Standard 414. A reduced payment schedule for unacceptable lots was included in the specification as a practical means of dealing with slight thickness deficiencies. In developing the schedule, consideration was given to the loss in pavement serviceability that a thickness dificiency could potentially cause. An analysis was made of the first 16 projects completed under statistically based specification. A total of 269 lots containing 836,000 tons of bituminous paving materials was involved. The specification performed quite well, matching closely the performance predicted by the specification's theoretical operating characteristic curve. However, because of concern expressed by field personnel, a revision which permits crediting of thickness excesses from one paving item to another is being considered.

Media Info

  • Features: Figures; Tables;
  • Pagination: p. 1-13
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00128534
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: May 14 1976 12:00AM