Stanhope Study of Compaction Methods for Bituminous Stabilized Base

In September of 1970 the Equipment Committee of the New Jersey Department of Transportation conducted its third major evaluation test of compaction equipment for bituminous stabilized base course. The basic objective of the test was to evaluate the compaction capabilities of two vibratory rollers and a tandem roller as compared to that of the Department's standard compaction system (3-wheel breakdown with tandem finish rolling). Comparisons were made utilizing both multiple and thick lift paving methods. The findings indicated that all rollers evaluated were capable of achieving acceptable densification levels in the stone mix, bituminous stabilized base course used in the test construction. In multiple lift construction the vibratory compactors were found to attain essentially the same base density as that produced by the Department's standard system. However, the vibratory units required approximately 25% more compaction time. In thick lift construction the Department's standard was again found to be the optimum of the roller systems considered. The vibratory rollers were not observed, within the range of applications evaluated, to cause so-called de-compaction or density drop off of the base material. Pavement riding quality was not adversely affected by either of the vibratory compactors studied. In addition, no measurable improvement in riding quality was discernible when the tandem rather than the 3-wheel roller was used for breakdown compaction. Riding quality measurements further suggest that, when a manually controlled paver is employed, the riding surface on thick lift base construction would be significantly rougher than that for standard multiple lift paving.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Appendices; Figures; Tables;
  • Pagination: 44p

Subject/Index Terms

Filing Info

  • Accession Number: 01665522
  • Record Type: Publication
  • Report/Paper Numbers: FHWA/NJ-71-006-7782
  • Files: TRIS, ATRI, USDOT, STATEDOT
  • Created Date: Feb 1 2018 10:38AM