00820079

Component

https://doi.org/10.3141/1767-08

http://scholar.google.com...tton&publication_year=2001

Microdamage accumulation due to fatigue loading, healing due to rest periods, and hysteresis heating during fatigue testing of asphalt mixtures using a dynamic mechanical analyzer were investigated. Specially fabricated sand-asphalt specimens were tested under a repetitive, controlled-strain torsional mode at 25 deg C and 10 Hz. Fatigue performance was evaluated using hysteresis loops of stress-pseudostrain and a simple parameter, pseudostiffness, based on the elastic-viscoelastic correspondence principle. Heat generation and dissipation during fatigue testing were also investigated by measuring temperature changes of a tiny thermocouple inside the asphalt mixtures. The results demonstrate that microdamage healing due to rest periods results in an increase of fatigue life. It was observed that the effects of hysteresis heating on the changes of stiffness during the fatigue test were not significant. Successful development of this testing method is suggested as a potential specification-type test method because of its rapidity, repeatability, and accuracy.

This paper appears in Transportation Research Record No. 1767, Asphalt Mixtures 2001.

English

p. 60-66

2001

Transportation Research Record

030907228X

Figures (11) ; References (17)

Accuracy; Asphalt mixtures; Fatigue (Mechanics); Fatigue tests; Heat loss; Heating (Structures); Hysteresis; Laboratory tests; Rest periods; Service life; Test procedures; Thermocouples

Dynamic mechanical analyzer; Healing; Microdamage; Repeatability

Design; Highways; Materials; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Nov 29 2001 12:00AM

• ADVANCED CHARACTERIZATION OF CRUMB RUBBER-MODIFIED ASPHALTS, USING PROTOCOLS DEVELOPED FOR COMPLEX BINDERS
• ASPHALT PERMEABILITY TESTING: SPECIMEN PREPARATION AND TESTING VARIABILITY
• CHARACTERISTICS OF COLD PROCESSED ASPHALT MILLINGS AND CEMENT-EMULSION MIX
• COMPARISON OF FOUR BRANDS OF SUPERPAVE GYRATORY COMPACTORS
• CONSTITUTIVE RELATIONS FOR ASPHALT CONCRETE UNDER HIGH RATES OF LOADING
• DESIGN, CONSTRUCTION, AND EARLY PERFORMANCE OF VIRGINIA'S HOT-MIX ASPHALT STABILIZER AND MODIFIER TEST SECTIONS
• DEVELOPMENT OF VOID PATHWAY TEST FOR INVESTIGATING VOID INTERCONNECTIVITY IN COMPACTED HOT-MIX ASPHALT CONCRETE
• EFFECT OF MIX GRADATION ON RUTTING POTENTIAL OF DENSE-GRADED ASPHALT MIXTURES
• EVALUATION OF LABORATORY-MEASURED CRACK GROWTH RATE FOR ASPHALT MIXTURES
• FATIGUE AND PERMANENT DEFORMATION MODELS FOR POLYMER-MODIFIED ASPHALT MIXTURES
• FIELD AGING EFFECTS ON FATIGUE OF ASPHALT CONCRETE AND ASPHALT-RUBBER CONCRETE
• GRADATION EFFECTS ON HOT-MIX ASPHALT PERFORMANCE
• HYDRAULIC CONDUCTIVITY (PERMEABILITY) OF LABORATORY-COMPACTED ASPHALT MIXTURES
• IMPACT OF GRADATION RELATIVE TO SUPERPAVE RESTRICTED ZONE ON HOT-MIX ASPHALT PERFORMANCE
• MECHANISTIC ANALYSIS OF ASPHALT PAVEMENTS, USING SUPERPAVE SHEAR TESTER AND HAMBURG WHEEL-TRACKING DEVICE
• MICROSTRUCTURE STUDY OF WESTRACK MIXES FROM X-RAY TOMOGRAPHY IMAGES
• QUANTITATIVE EVALUATION OF STRIPPING POTENTIAL IN HOT-MIX ASPHALT, USING ULTRASONIC ENERGY FOR MOISTURE-ACCELERATED CONDITIONING
• REPEATED TRIAXIAL TESTING DURING MIX DESIGN FOR PERFORMANCE CHARACTERIZATION
• SOME CHARACTERISTICS OF FOAMED BITUMEN MIXES
• VARIABILITY OF ASPHALT MIXTURE TESTS USING SUPERPAVE SHEAR TESTER REPEATED SHEAR AT CONSTANT HEIGHT TEST