01478661

Component

https://doi.org/10.3141/2373-09

http://scholar.google.com...lion&publication_year=2013

Cracking is one of the predominant distresses occurring in hot-mix asphalt (HMA) pavements and often costs highway agencies millions of dollars in road maintenance and rehabilitation activities. One way to minimize this distress is through material screening and selection of appropriate mix designs that are representative of crack-resistant HMA. However, there are no universally adapted standardized laboratory cracking test methods for routine mix design and screening purposes for HMA mix crack resistance. In this study, three repeated loading cracking test methods—namely, the repeated loading overlay tester (OTR), repeated loading indirect tension (R-IDT), and repeated loading semicircular bending (R-SCB)—were evaluated and compared for their potential application as surrogate tests for routine crack evaluation and screening of HMA mixes in the laboratory. The evaluation criteria, based on commonly used Texas HMA mixes, included (a) the potential to differentiate and screen mixes readily, (b) the sensitivity to mix design variables such as variations in the asphalt binder content, (c) repeatability and statistical variability, (d) correlation to field performance data, and (e) the practicality of implementation. Overall, the OTR test, with a proven correlation to field performance data, exhibited statistical superiority as a practical repeated loading crack test method for routine HMA mix design and screening, followed by the R-IDT test. However, although the R-IDT test exhibited superiority concerning sample fabrication simplicity, validation with field data remains one of the key challenges to be addressed with this test. The R-SCB test was the least repeatable, particularly at high asphalt binder content levels, and appears to be better suited for low-temperature testing.

01517321

13-3495

English

pp 81–88

2013

Transportation Research Record: Journal of the Transportation Research Board

9780309287081

Print

Figures (6) ; Photos; References (9) ; Tables (6)

Hot mix asphalt; Laboratory tests; Mix design; Pavement cracking; Performance tests; Repeated loads

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

TRIS, TRB, ATRI

Feb 5 2013 12:42PM

• Approach for Quantifying the Effect of Binder Oxidative Aging on the Viscoelastic Properties of Asphalt Mixtures
• Comparison of Uniaxial and Four-Point Bending Fatigue Tests for 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 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