00931970

Component

https://doi.org/10.3141/1789-12

http://scholar.google.com...asad&publication_year=2002

A methodology for relating the microstructure of asphalt concretes to their viscoelastic behavior is described. Imaging techniques are used to capture the asphalt concrete microstructure, and the finite element method (FEM) is used to model its stress-strain behavior in the time domain. Aggregates are modeled as linear elastic, and the binder is modeled through mechanistic models as either linear viscoelastic or nonlinear viscoelastic. The binder viscoelastic properties are input into the FEM algorithm by two methods: a built-in viscoelastic function and a user-specified material characterization subroutine. The latter handles nonlinearity in an iterative piecewise linear fashion, whereby the mechanistic binder model parameters are updated as a function of the strain level. For each strain level, mechanistic models are fitted to describe binder viscoelastic behavior based on dynamic shear rheometer data. The two approaches used for specifying binder viscoelastic properties into the FEM algorithm were verified by comparing binder response predictions with direct measurements. Finally, the asphalt concrete microstructure model was verified by comparing FEM predictions of dynamic shear modulus and phase angle with measurements obtained by using a Superpave (Registered trademark) shear tester.

This paper appears in Transportation Research Record No. 1789, Bituminous Paving Mixtures 2002.

English

p. 113-120

2002

Transportation Research Record

0309077141

Figures (11) ; References (25) ; Tables (2)

Algorithms; Asphalt concrete; Binders; Finite element method; Image processing; Mathematical prediction; Measurement; Mechanistic design; Microstructure; Shear modulus; Strain (Mechanics); Stresses; Viscoelasticity

Nonlinearity; Phase angle

Data and Information Technology; Highways; Materials; Pavements; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Oct 4 2002 12:00AM

• AGGREGATE BLENDING FOR ASPHALT MIX DESIGN: BAILEY METHOD
• APPLICATION OF DIGITAL IMAGE CORRELATION METHOD TO MECHANICAL TESTING OF ASPHALT-AGGREGATE MIXTURES
• COARSE- VERSUS FINE-GRADED SUPERPAVE MIXTURES: COMPARATIVE EVALUATION OF RESISTANCE TO RUTTING
• COMPARISON OF FUNDAMENTAL AND SIMULATIVE TEST METHODS FOR EVALUATING PERMANENT DEFORMATION OF HOT-MIX ASPHALT
• DETERMINING THE LOW-TEMPERATURE FRACTURE TOUGHNESS OF ASPHALT MIXTURES
• DYNAMIC MODULUS OF ASPHALT CONCRETE WITH A HOLLOW CYLINDER TENSILE TESTER
• EFFECT OF AGGREGATE STRUCTURE ON RUTTING POTENTIAL OF DENSE-GRADED ASPHALT MIXTURES
• EFFECT OF FINE AGGREGATE ANGULARITY ON COMPACTION AND SHEARING RESISTANCE OF ASPHALT MIXTURES
• EVALUATION OF FATIGUE HEALING EFFECT OF ASPHALT CONCRETE BY PSEUDOSTIFFNESS
• EVALUATION OF MEASUREMENT TECHNIQUES FOR ASPHALT PAVEMENT DENSITY AND PERMEABILITY
• HISTORY AND FUTURE CHALLENGES OF GYRATORY COMPACTION: 1939 TO 2001
• INFLUENCE OF ASPHALT TACK COAT MATERIALS ON INTERFACE SHEAR STRENGTH
• LOUISIANA EXPERIENCE WITH CRUMB RUBBER-MODIFIED HOT-MIX ASPHALT PAVEMENT
• PREDICTING VISCOELASTIC RESPONSE AND CRACK GROWTH IN ASPHALT MIXTURES WITH THE BOUNDARY ELEMENT METHOD
• ROUND-ROBIN STUDY FOR FIELD PERMEABILITY TEST
• RUNOFF CONTROL IN POROUS PAVEMENTS
• SHEAR PROPERTIES AS VIABLE MEASURES FOR CHARACTERIZATION OF PERMANENT DEFORMATION OF ASPHALT CONCRETE MIXTURES
• SIMPLE PERFORMANCE TEST FOR FATIGUE CRACKING AND VALIDATION WITH WESTRACK MIXTURES
• STANDARDIZED PROCEDURE FOR ANALYSIS OF DYNAMIC MODULUS \E*\ DATA TO PREDICT ASPHALT PAVEMENT DISTRESSES
• TARGET AND TOLERANCE STUDY FOR ANGLE OF GYRATION USED IN SUPERPAVE GYRATORY COMPACTOR
• TIME-TEMPERATURE SUPERPOSITION FOR ASPHALT CONCRETE AT LARGE COMPRESSIVE STRAINS
• TOWARD A MICROMECHANICS-BASED PROCEDURE TO CHARACTERIZE FATIGUE PERFORMANCE OF ASPHALT CONCRETE
• USE OF STIFFNESS OF HOT-MIX ASPHALT AS A SIMPLE PERFORMANCE TEST