A STUDY OF STRENGTH CHARACTERISTICS OF ASPHALT-AGGREGATE MIXTURES AS AFFECTED BY THE GEOMETRIC CHARACTERISTICS AND GRADATION OF AGGREGATES

RESULTS OF A LABORATORY STUDY CONCERNING (1) THE RELATIVE IMPORTANCE AND QUANTITATIVE EFFECT OF THE GEOMETRIC CHARACTERISTICS OF COARSE AND FINE AGGREGATE AND (2) THE EFFECT OF AGGREGATE GRADATION ON THE STRENGTH CHARACTERISTICS OF ASPHALT-AGGREGATE MIXTURES IN TRIAXIAL COMPRESSION ARE REPORTED. TWO COARSE AGGREGATES AND TWO FINE AGGREGATES, REPRESENTING BOTH NATURAL AND CRUSHED MATERIALS, WERE USED. THE RESULTS SHOW THAT THE INFLUENCES OF THE GEOMETRIC CHARACTERISTICS OF BOTH THE COARSE AND THE FINE AGGREGATES ON THE MAXIMUM PRINCIPAL STRESS DIFFERENCES OF THE ASPHALT-AGGREGATE MIXTURES, AT A GIVEN RATE OF AXIAL DEFLECTION, DEPEND UPON THE GRADATION OF THE AGGREGATE MATERIAL. FOR MIXTURES CONTAINING AGGREGATES OF THE SAME GRADATION, THE MAXIMUM PRINCIPAL STRESS DIFFERENCE IN MOST CASES INCREASE SIGNIFICANTLY WITH VALUES OF THE PARTICLE INDEX OF THE TWO SIZES OF AGGREGATE. THE RELATIVE EFFECTS OF THE GEOMETRIC CHARACTERISTICS OF THE TWO SIZES OF AGGREGATE, AT A GIVEN AGGREGATE GRADATION, APPEAR TO VARY WITH THE RATE OF AXIAL DEFLECTION AND, IN SOME CASES, WITH THE CONFINING PRESSURE. /AUTHOR/

• Supplemental Notes:
  • Vol 39, pp 98-133
• Authors:
  • Huang, E Y
• Conference:
  • Association of Asphalt Paving Technologists Proc
• Publication Date: 1970

Subject/Index Terms

• TRT Terms: Aggregate gradation; Aggregate mixtures; Aggregates by shape and surface texture; Asphalt; Coarse aggregates; Compression; Compression tests; Fine aggregates; Particles; Principal stresses; Shape; Strength of materials
• Uncontrolled Terms: Aggregate shape; Triaxial compression
• Old TRIS Terms: Compressive strength tests; Particle shapes; Principal stress
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00211620
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 2 1971 12:00AM