EFFECT OF CLIMATE AND ASPHALT CONCRETE LAYER THICKNESS ON THEORETICAL RADIAL STRESSES AND STRAINS IN FLEXIBLE PAVEMENT SYSTEMS WITH DISCUSSION

A MODEL FOR DETERMINING THEORETICAL RADIAL STRESSES AND STRAINS AT VARIOUS LOCATIONS IN MULTILAYERED FLEXIBLE PAVEMENT SYSTEMS AS A FUNCTION OF LOAD, CLIMATIC EXPOSURE CONDITIONS, AND MATERIAL CHARACTERISTICS HAS BEEN APPLIED TO TWO TEST SECTIONS AT THE AASHO ROAD TEST FOR A PERIOD FROM JULY 1, 1959 TO JUNE 30, 1960. THEORETICAL STRESSES AND STRAINS AT THE ASPHALT CONCRETE-BASE INTERFACE AT 1400 HR. AND BIDAILY DURING THE STUDY YEAR HAVE BEEN COMPUTED AND COMPARED. THE RELATIVE INFLUENCE OF CLIMATE AND ASPHALT CONCRETE LAYER THICKNESS ON THE MAGNITUDE OF RADIAL STRESS AND STRAIN WAS ESTABLISHED. IMPLICATIONS OF THE RESULTS ON THE PERFORMANCE CHARACTERISTICS OF THE FLEXIBLE PAVEMENT SECTIONS ARE DESCRIBED. THE MODEL UTILIZED IN THE ANALYSIS COMBINED A HEAT-TRANSFER MODEL FOR EVALUATING THE TEMPERATURE REGIME AND FROST-LINE POSITION IN A PAVEMENT SYSTEM WITH AN ELASTIC LAYER MODEL FOR STRESS AND STRAIN DETERMINATION. MODULAR VALUES AND LAYER THICKNESSES USED IN THE ANALYSIS WERE ESTABLISHED BASED ON LAYER INTERFACE LOCATION, FROST-LINE LOCATION, AND LAYER CONDITION (FROZEN OR UNFROZEN). STIFFNESSES OF THE ASPHALT CONCRETE SURFACE AND BINDER LAYERS AS A FUNCTION OF LAYER TEMPERATURE WERE DETERMINED BY USE OF THE PROCEDURE DEVELOPED BY VAN DER POEL AND REVISED BY HEUKELOM AND KLOMP. A DISCUSSION IS INCLUDED WHICH DEALS WITH SEVERAL QUESTIONS ARISING FROM THIS INVESTIGATION.

• Authors:
  • Dempsey, B J
  • Marek, C R
• Conference:
  • Association of Asphalt Paving Technologists Proc
• Publication Date: 1972

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 582-96
• Serial:
  • Volume: 41

Subject/Index Terms

• TRT Terms: Asphalt concrete; Climate; Crash exposure; Deformation curve; Elasticity (Mechanics); Flexible pavements; Frost; Heat transfer; Information processing; Interfaces; Loads; Mathematical models; Pavements; Radials; Stiffness; Stresses; Temperature; Thickness; Weathering
• Identifier Terms: AASHO Road Test
• Uncontrolled Terms: Exposure; Models; Pavement thickness
• Old TRIS Terms: Elastic theory; Frost line; Radial stress
• Subject Areas: Highways; Materials; Pavements; Safety and Human Factors;

Filing Info

• Accession Number: 00211825
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 17 2002 12:00AM