BASIC PROPERTIES OF PAVEMENT COMPONENTS

THE EFFECTS OF AGGREGATE DENSITY, AGGREGATE GRADATION, AND DEGREE OF SATURATION ON THE RESILIENT RESPONSE OF BOTH A CRUSHED AND A PARTIALLY CRUSHED AGGREGATE WERE DETERMINED IN TRIAXIAL-COMPRESSION REPEATED LOAD TESTS FOR A RANGE OF STRESSES REPRESENTATIVE OF THOSE EXPECTED IN ACTUAL PAVEMENTS. FOR BOTH GRANULAR MATERIALS THE STIFFNESS INCREASED DIRECTLY WITH CONFINING PRESSURE AND ONLY SLIGHTLY WITH INCREASING AXIAL STRESS. POISSON'S RATIO INCREASED WITH DECREASING CONFINING PRESSURE AND INCREASING REPEATED STRESS. THE STIFFNESS FOR A GIVEN STRESS CONDITION GENERALLY INCREASED WITH INCREASING DENSITY, DECREASING FINES CONTENT, AND DECREASING DEGREE OF SATURATION. THE RESULTS OF A SERIES OF LOAD PLATE TESTS, PERFORMED ON A PAVEMENT SECTION 20 FT BY 20 FT IN PLANE AND CONSISTING OF AN ASPHALT SURFACE, AGGREGATE BASE, AND CLAYEY SUBGRADE, INDICATED THAT PREDICTED STRESSES, STRAINS, AND DISPLACEMENTS (BY PSUEDO NON-LINEAR ELASTIC ANALYSES) COMPARED REASONABLY WELL WITH IN SITU MEASUREMENTS. FRACTURE TESTS ON ASPHALT CONCRETE WERE PERFORMED TO DELINEATE THE INFLUENCE OF MIXTURE COMPOSITION AND TO PROVIDE DATA FOR FRACTURE AND FATIGUE ANALYSES. A PROCEDURE FOR FATIGUE LIFE PREDICTION WAS DEVELOPED WITH THE NECESSARY CRACK GROWTH LAW OBTAINED EXPERIMENTALLY FROM COMPLIANCE MEASUREMENTS. ULTIMATE STRENGTH ANALYSES OF BITUMINOUS SURFACINGS WERE PERFORMED FOR TYPICAL PROBLEMS USING A PLANE STRESS FINITE ELEMENT ANALYSIS WITH INCREMENTAL LOAD APPLICATION AND NON-LINEAR MATERIAL PROPERTIES. THE ANALYSES INDICATED THE IMPORTANCE OF BOUNDARY CONDITIONS AND MATERIAL PROPERTIES IN THE MODE AND SEQUENCE OF SYSTEM FAILURE. /FHWA/

• Corporate Authors:

  University of California, Berkeley

  Berkeley, CA  United States  94720
• Authors:
  • Monismith, C L
  • Hicks, R G
  • SALAM, Y M
• Publication Date: 1971-9

Media Info

• Pagination: 199 p.

Subject/Index Terms

• TRT Terms: Asphalt concrete; Bituminous pavements; Fatigue (Mechanics); Fracture mechanics; Granular materials; Gravel; Loads; Pavements; Pressure; Resilience (Materials); Stiffness; Stresses
• Uncontrolled Terms: Fracture
• Subject Areas: Geotechnology; Highways; Pavements;

Filing Info

• Accession Number: 00217504
• Record Type: Publication
• Source Agency: Federal Highway Administration
• Report/Paper Numbers: FHWA-RD-72- 19 Final Rpt., FCP 34A2-031
• Contract Numbers: DOT-FH-11-6912
• Files: TRIS, USDOT
• Created Date: Apr 30 1976 12:00AM