01620198

Component

https://doi.org/10.3141/2631-12

Asphalt fatigue cracking is widely recognized as one of the most important pavement distresses, which is typically evaluated in the laboratory by conducting repeated load fatigue tests. There is no simple model that can fully reproduce the evolution of the stiffness of asphalt specimens during fatigue testing. This reality limits analysis and interpretation of asphalt fatigue data and the implementation of test results in mechanistic–empirical modeling. Two simple models, based on the logit function, are presented in this paper. These models, called logit and logit-sigmoidal, were found to reproduce almost exactly the evolution of specimen stiffness during flexural fatigue testing. This capability was used to locate critical points of the stiffness degradation curve, including failure points according to complex failure criteria. The mechanical meaning of the parameters of the logit model is analyzed in this paper. One of the parameters was related to the ability of the asphalt mix to sustain damage before crack initiation. Another parameter was related to the presence of reversible phenomena—heating and thixotropy—in the first part of the stiffness degradation curve. The applicability of the logit model to mechanistic–empirical pavement design is also evaluated in this paper on the basis of implementation in the CalME mechanistic–empirical software.

01637861

17-05840

English

0000-0002-3614-2858

0000-0001-7364-7583

0000-0002-8924-6212

pp 105–113

2017

Transportation Research Record: Journal of the Transportation Research Board

9780309441506

Digital/other

Figures (7) ; References (9)

Asphalt mixtures; Cracking; Degradation failures; Evaluation; Fatigue tests; Logits; Mechanistic-empirical pavement design; Pavement performance; Stiffness

Design; Highways; Materials; Pavements

TRIS, TRB, ATRI

Dec 8 2016 12:20PM

• Characterization of Permanent Deformation of Asphalt Mixtures with Minimum Strain Rate, LVECD Program, and Triaxial Stress Sweep Test
• Comparing the Performance of Fiberglass Grid with Composite Interlayer Systems in Asphalt Concrete
• Effect of Pore Water Pressure on Response of Asphalt Concrete
• Evaluation of Small Specimen Geometries for Asphalt Mixture Performance Testing and Pavement Performance Prediction
• Laboratory Evaluation of a Plant-Produced High Polymer–Content Asphalt Mixture
• New and Simpler Cracking Test Method for Asphalt Mix Designs
• Numerical Modeling and Artificial Neural Network for Predicting J-Integral of Top-Down Cracking in Asphalt Pavement
• Overlay Tester Results from Dense-Graded Asphalt Concrete Mixes: Accuracy in Characterizing Crack Susceptibility
• Practical Method to Determine Strain Level for Cyclic Direct Tension Fatigue Testing in the Asphalt Mixture Performance Tester
• Sensitivity of the Illinois Flexibility Index Test to Mixture Design Factors
• Short-Term Performance and Evolution of Material Properties of Warm- and Hot-Mix Asphalt Pavements: Case Studies
• Use of Digital Image Correlation for the Evaluation of Flexural Fatigue Behavior of Asphalt Beams with Geosynthetic Interlayers
• Use of Fine Aggregate Matrix Experimental Data in Improving Reliability of Fatigue Life Prediction of Asphalt Concrete: Sensitivity of This Approach to Variation in Input Parameters
• Use of Nonlinear Acoustic Measurements for Estimation of Fracture Performance of Aged Asphalt Mixtures
• Viscoelasticplastic–Fracture Modeling of Asphalt Mixtures Under Monotonic and Repeated Loads