TRANSVERSE CRACKING DISTRESS AND VERTICAL DYNAMIC IMPACT LOAD FROM HEAVY TRUCK AXLES - A FEASIBILITY STUDY

The Pavements and Roadway Office, Vehicle Technology Office and Regional Geotechnical Office carried out a feasibility study to ascertain whether the following objectives were attainable: (1) Develop a severity assessment scale for cupping distress of transverse cracks based on the vertical dynamic impact load from heavy axles; (2) Develop threshold criteria for maintenance and rehabilitation using this tire/pavement interaction data; and (3) Develop functional equipment for routine operational usage. The experimental site was a pavement built in 1952-53 as a 225 mm (9 in.) plain non-reinforced concrete pavement, 6.1 m (20 ft) slab with no load transfer devices between slabs. The base design was 100 mm (4 in.) granular "A" over 125 mm (5 in.) granular "B" over a heavy clay subgrade. In 1967, the badly stepped pavement was resurfaced with a thin lift of sand asphalt 20 mm (1 in.). In 1973, major resurfacing included 50 mm (2 in.) modified HL5 levelling course, 40 mm (1.6 in.) HL5 base course, and 40 mm (1.6 in.) HL1 wearing course. In 1981, rout and seal maintenance was carried out to retard the cupping at the transverse cracks. In 1988, the pavement was designated for rehabilitation in 1989 due to severe cupping of the transverse cracks. Briefly, the feasibility study results pointed toward the following: (1) Static load deflection from the Benkelman Beam is not a good indicator of internal deterioration for cupped transverse cracking; (2) It is possible to correlate the axle vertical acceleration responses in g generated by various degrees of cupping deformation at the transverse cracks; (3) It is possible to correlate the axle vertical acceleration responses in g generated by the transverse cracks and the internal deterioration of the same transverse cracks; (4) It is possible to correlate the degree of cupping deformation of the transverse cracks and their corresponding internal deterioration; (5) It is possible to establish a threshold criteria based on the vertical dynamic impact load responses in g for corrective and preventative maintenance, and rehabilitation design decision making; and (6) It is possible to develop innovative equipment with which better information becomes available for cost-effective maintenance, rehabilitation, and management of resources.

  • Corporate Authors:

    Ontario Ministry of Transportation & Communic, Can

    1201 Wilson Avenue
    Downsview, Ontario M3M 1J8,   Canada 
  • Authors:
    • Chong, G
    • STEPHENSON, W
    • Wolkowicz, M E
  • Publication Date: 1989-7

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 20 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00607591
  • Record Type: Publication
  • Report/Paper Numbers: PAV-89-03
  • Files: TRIS
  • Created Date: Apr 30 1991 12:00AM