01476348

Component

https://doi.org/10.3141/2373-05

http://scholar.google.com....+Wu&publication_year=2013

The fatigue properties of asphalt mixtures estimated with fatigue tests in the laboratory are difficult to compare with each other. One reason is that for so-called inhomogeneous tests that do not have a uniform stress–strain distribution, the measured stiffness is a weighted overall stiffness that does not really represent the stiffness of the damaged zone. For homogenous fatigue tests, the stress–strain field within the specimen is uniform in theory. In this case, the measured stiffness corresponds to a material property. It is supposed that the stiffness evolutions in the inhomogeneous tests might be described by the results from the homogenous test. In this paper, the results of the uniaxial tension and compression (UT–C) fatigue test and the four-point bending (FPB) fatigue test are described and compared. The evolutions of the stiffness and phase angle are simulated by means of the partial healing model. With the model parameters, the local stiffness for each volume unit of the beam is calculated. It is found that, on the basis of the measured overall stiffness, the classical fatigue life Nf,50 of the beam in the FPB fatigue test is larger than that of the cylinder in the UT–C fatigue test. However, in the midsection of the beam, the local stiffness evolution is similar to that observed in the UT–C fatigue test. On the basis of the local stiffness concept, comparable fatigue lines can be obtained from the UT–C and FPB fatigue tests.

01517321

13-2610

English

pp 44–53

2013

Transportation Research Record: Journal of the Transportation Research Board

9780309287081

Print

Figures (10) ; References (23) ; Tables (2)

Asphalt mixtures; Deformation curve; Fatigue tests; Stiffness; Uniaxial stress

Highways; Materials; Pavements; I22: Design of Pavements, Railways and Guideways

TRIS, TRB, ATRI

Feb 5 2013 12:33PM

• Approach for Quantifying the Effect of Binder Oxidative Aging on the Viscoelastic Properties of Asphalt Mixtures
• Constitutive Modeling of Cyclic Viscoplastic Response of Asphalt Concrete
• Constitutive Modeling of Fatigue Damage Response of Asphalt Concrete Materials
• Development of Calibration Testing Protocol for Permanent Deformation Model of Asphalt Concrete (With Discussion and Closure)
• Laboratory Hot-Mix Asphalt Cracking Testing: Evaluation of Three Repeated Loading Crack Tests
• Laboratory Validation of Healing-Based Fatigue Endurance Limit for Hot-Mix Asphalt
• Local Practice of Assessing Dynamic Modulus Properties for Washington State Mixtures
• Mechanistic-Based Approach to Evaluate Rutting Susceptibility of Hot-Mix Asphalt Mixtures by Use of Dynamic Triaxial Testing
• Modeling Water Vapor Diffusion in Pavement and Its Influence on Fatigue Crack Growth of Fine Aggregate Mixture
• Modified Paris’s Law to Predict Entire Crack Growth in Asphalt Mixtures
• Nonlinear Viscoelastic Behavior of Asphalt Concrete and Its Implication for Fatigue Modeling
• Permanent Deformation Characterization of Asphalt Mixtures by Using Incremental Repeated Load Testing
• Three-Dimensional Microstructural Modeling of Asphalt Concrete by Use of X-Ray Computed Tomography