00931979

Component

https://doi.org/10.3141/1789-21

http://scholar.google.com....+Li&publication_year=2002

There has been a sustained effort in applying fracture mechanics concepts to crack formation and propagation in bituminous pavement materials. Adequate fracture resistance is an essential requirement for asphalt pavements built in the northern part of the United States and Canada, for which the prevailing failure mode is cracking due to low-temperature shrinkage stresses. The current Superpave (Registered trademark) specifications address this issue mainly through the use of strength tests on unnotched (smooth boundary) specimens. However, recent studies have shown the limitations of this approach and have suggested that fracture mechanics concepts, based on tests performed on notched samples, should be used instead. Research in progress at the University of Minnesota investigates the use of fracture mechanics principles to determine the low-temperature fracture properties of asphalt mixtures. A testing protocol is presented that makes it possible to obtain multiple measurements of fracture toughness as a function of crack propagation based on the compliance method to measure crack length. An increase in fracture toughness with crack length is observed, which is consistent with the behavior displayed by other brittle materials. The plateau of the curves may be representative of the asphalt concrete resistance to fracture, because the initial values can be significantly influenced by the presence of the inelastic zone at the crack tip.

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

English

0000-0002-5264-3775

p. 191-199

2002

Transportation Research Record

0309077141

Figures (6) ; References (18) ; Tables (2)

Asphalt mixtures; Fracture mechanics; Fracture properties; Low temperature; Shrinkage; Stresses

Crack length; Crack propagation

Highways; Materials; 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
• 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
• MICROMECHANICAL ANALYSIS OF VISCOELASTIC PROPERTIES OF ASPHALT CONCRETES
• 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