STRENGTH OF GUSSASPHALT AS INFLUENCED BY MINERAL FILLERS

AS A PAVING MATERIAL, GUSSASPHALT IS KNOWN TO PROVIDE A TOUGH, DURABLE, AND WATERTIGHT SURFACE, BUT LITTLE IS KNOWN CONCERNING ITS SPECIFIC ENGINEERING PROPERTIES. SINCE THIS MATERIAL IS POURED INTO PLACE AND REQUIRES NO COMPACTION, IT MAY BE POSSIBLE TO DEVELOP THE MATERIAL FOR SPECIAL PAVING APPLICATIONS IF APPROPRIATE STRENGTH AND OTHER PARAMETERS CAN BE OBTAINED. A TESTING PROGRAM WAS DEVISED TO STUDY THE INFLUENCE OF TEMPERATURE, RATE OF LOADING AND TYPE OF MINERAL FILLER ON THE ULTIMATE COMPRESSIVE STRENGTH, ULTIMATE TENSILE STRENGTH, AND VISCOELASTIC BEHAVIOR IN TENSION OF GUSSASPHALT. FILLER MATERIALS USED AS ADDITIONS TO THE NORMAL LIMESTONE TO IMPROVE SOME STRENGTH PARAMETERS OF A CONTROL MIX OF GUSSASPHALT INCLUDED ASBESTOS AND FIBER GLASS. TESTS WERE CONDUCTED AT TEMPERATURES FROM 32 TO 120 DEGREES F. AND AT LOADING RATES FROM 0.005 TO 0.5 INCHES PER MINUTE. COMPARISON OF TESTS ON GUSSASPHALT WITH RESULTS FOR CONVENTIONAL BITUMINOUS MIXTURES SHOW THAT AT HIGH TEMPERATURES THE GUSSASPHALT EXHIBITS GREATER TENSILE AND COMPRESSIVE STRENGTHS, WHILE THE REVERSE IS TRUE AT LOW TEMPERATURES. THE INFLUENCE OF FIBER GLASS OR ASBESTOS FILLER MIXED WITH CONVENTIONAL LIMESTONE FILLER WAS SIGNIFICANT ONLY AT LOW TEMPERATURES, WHERE THE TENSILE STRENGTH AND STIFFNESS OF THE MATERIAL WERE ENHANCED BY THE USE OF THESE MATERIALS. THIS BEHAVIOR IS EXPLAINED IN TERMS OF THE GRIFFITH FRACTURE THEORY FOR BRITTLE MATERIALS. FINALLY, GUSSASPHALT IS SHOWN TO BE A LINEAR VISCOELASTIC MATERIAL FOR ALL TYPES OF FILLER MATERIAL USED IN THIS STUDY. /AUTHOR/

• Supplemental Notes:
  • Vol 36, pp 731-750, 4 FIG, 3 TAB, 59 REF
• Authors:
  • Schultz, B G
  • Jones, R C
• Conference:
  • Assoc Asphalt Paving Technol Proc
• Publication Date: 1967-2

Subject/Index Terms

• TRT Terms: Alternatives analysis; Asbestos; Asphalt; Bituminous mixtures; Compressive strength; Fiberglass; Fillers (Materials); Fracture mechanics; Limestone fillers; Loads; Mineral fillers; Paving; Temperature; Tensile strength; Tension; Testing; Theory; Viscoelasticity
• Uncontrolled Terms: Loading rate
• Old TRIS Terms: Asbestos fillers
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00210727
• Record Type: Publication
• Files: TRIS
• Created Date: Apr 2 1994 12:00AM