VOID PARAMETERS OF 24 CORES OF CONCRETE REMOVED FROM A CONSOLIDATION TEST STUDY SECTION OF I-64

During the construction of I-64 near Charlottesville, Virginia, the Ballenger Paving Company chose to set up a limited experiment to investigate various factors affecting the consolidation of concrete by vibration. The test design varied the speed of the paver and used vibrations at several frequencies. Speeds of 3, 4, 25, 5.5, 11, 12, and 14 feet per minute and frequencies ranging from 7,800 to 10,100 revolutions per minute were used in 6 test sections. The analyses showed that for any particular concrete the faster the motion of the vibrators through the concrete and the greater the spacing the less will be the consolidation. Between batches, it was found that the greater the slump or workability the greater the consolidation achieved by a set of vibrator conditions. The frequencies of the vibrators used covered such a narrow range that no correlation between frequency and consolidation was possible. Insufficient sampling precluded the determination of aggregate segregation. Although the numerical results of the void determinations and correlations with vibration parametes are not statistically defensible, the trends obtained appear reasonable and valid and should be helpful in establishing general relationships. The results are presented in numerical form to provide data as to the order of magnitude of the interactions of the factors involved in the consolidation process. For the type of concrete and kind of vibrators used, the data seem to indicate that if the slump approaches 1-inch then the forward speed of the vibrator screed should be no more than 6 feet per minute when the spacing of the vibrators is about 2 feet. Higher speeds will probably produce high void, less abrasion resistant areas of pavement.

  • Record URL:
  • Corporate Authors:

    Virginia Highway and Transportation Research Council

    Charlottesville, VA  United States 

    Virginia Department of Highways

    Traffic and Planning Division, 1221 East Broad Street
    Richmond, VA  United States  23219
  • Authors:
    • Walker, H N
  • Publication Date: 1972-12

Media Info

  • Pagination: n.p.

Subject/Index Terms

Filing Info

  • Accession Number: 00392138
  • Record Type: Publication
  • Report/Paper Numbers: VHTRC 72-R13
  • Files: NTL, TRIS, STATEDOT
  • Created Date: Jun 30 1985 12:00AM