01620222

Component

https://doi.org/10.3141/2631-01

Because of environmental conservation and sustainability concerns, reclaimed asphalt pavements and recycled asphalt shingles are increasingly used in the asphalt paving industry to replace virgin asphalt and aggregate materials. However, these recycled materials are often highly aged and can cause cracking issues for asphalt pavements. Additionally, other factors such as binder additives, modifiers, and multiple warm-mix asphalt technologies can alter the performance of the mixtures both positively and negatively. The volumetric mix design alone is not sufficient for evaluating the potential cracking behavior of asphalt mixes. Although many cracking test methods are available, there is no widely accepted performance-related cracking test method that is practical enough for routine use in asphalt mix designs. This paper presents a newly developed, simple, and practical cracking test method for asphalt mix designs. The new cracking test method is repeatable, time- and cost-effective, easily implemented, sensitive to mix compositions, and well correlated to field performance. The new cracking test is performed at an intermediate temperature of 25ºC and a loading rate of 50 mm/min. Furthermore, a unitless index is proposed as the cracking resistance indicator for evaluation of the cracking resistance of asphalt mixes. Additionally, the effectiveness of the new cracking test was validated with the test results from FHWA’s accelerated loading facility.

01637861

17-02039

English

pp 1–10

2017

Transportation Research Record: Journal of the Transportation Research Board

9780309441506

Digital/other

Figures (9) ; References (16) ; Tables (2)

Asphalt mixtures; Cracking; Mix design; Reclaimed asphalt pavements; Recycled materials; Sustainable development

Design; Highways; Materials; Pavements

TRIS, TRB, ATRI

Dec 19 2016 1:10PM

• 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
• 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
• The Logit Model and the Need to Reproduce the Stiffness Degradation Curve of Asphalt Specimens During Fatigue Testing
• 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