FIELD EXPERIMENTATION WITH BITUMINOUS UNDERSEALING MATERIALS

THE PRACTICE OF INJECTING HOT ASPHALT UNDER CONCRETE PAVEMENTS FOR STABILIZING THE SLABS AND CONTROLLING PUMPING HAS BEEN USED EXTENSIVELY IN ILLINOIS FOR SEVERAL YEARS. MUCH OF THE WORK HAS BEEN IN CONJUNCTION WITH RESURFACING OF OLD CONCRETE PAVEMENTS WITH BITUMINOUS-CONCRETE RESURFACING, WHERE THE UNDERSEAL IS USED TO FILL VOIDS IN THE SUBGRADES AND RESEAT UNSTABLE SLABS PRIOR TO RESURFACING OPERATIONS. THE UNDERSEAL MATERIAL IS A SLIGHTLY MODIFIED GRADE A OIL ASPHALT FILLER AASHO DESIGNATION: M18-42A. THIS MATERIAL APPEARS TO HAVE SATISFACTORY FLUIDITY AT THE TIME OF PUMPING AND DOES NOT BLEED EXCESSIVELY AT PREVAILING SUMMER TEMPERATURES. HOWEVER, THERE IS SOME EVIDENCE THAT THE MATERIAL BECOMES BRITTLE AND CRACKS AT LOW TEMPERATURES, DESTROYING ITS INTENDED FUNCTION AS A FLEXIBLE BARRIER AGAINST THE PUMPING OF SUBGRADE FINES UNDER HEAVY TRAFFIC. IN THE EXPERIMENT DESCRIBED, THREE ASPHALTIC MATERIALS WERE USED IN CONJUNCTION WITH TWO RATES OF APPLICATION: (1) AASHO DESIGNATION: M18-42A, WITH A MODIFIED MINIMUM LIMIT FOR DUCTILITY SET AT 3.0 CM; (2) 0-KORITE, A MATERIAL HAVING RELATIVELY HIGH DUCTILITY AT LOW TEMPERATURES; AND (3) EXPERIMENTAL NO. 2, A MATERIAL HAVING A LOW TEMPERATURE DUCTILITY MIDWAY BETWEEN THAT OF M18-42A MATERIAL AND 0-KORITE. TEST SECTIONS 4,000 FT. LONG WERE USED FOR EACH MATERIAL AND EACH RATE OF APPLICATION. CONDITION SURVEYS WERE MADE DURING THE SPRING PRIOR TO THE UNDERSEAL APPLICATION AND DURING THE SPRING FOLLOWING APPLICATION. THE SECOND SURVEY INDICATED THAT THE TREATMENT MATERIALLY REDUCED PUMPING. /AUTHOR/

  • Supplemental Notes:
    • Vol 32, pp 343-354, 3 FIG, 5 TAB, 1 PHOT
  • Authors:
    • Chastain, W E
    • Burke, J E
  • Publication Date: 1953

Media Info

  • Monograph Title: Proceedings of the Thirty-Second Annual Meeting of the Highway Research Board, Washington, D.C., January 13-16, 1953
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00211621
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Aug 15 1971 12:00AM