01372852

Component

https://doi.org/10.3141/2296-09

http://scholar.google.com...ttle&publication_year=2012

The importance of healing and its impact on the fatigue cracking performance of asphalt mixtures are well recognized. Microdamage healing in an asphalt mixture is a function of several factors, such as the physical and chemical properties of the binder, the properties of the mixture, the level of damage before the rest period during which healing occurs, the duration of the rest period, temperature, and pressure. An experimental and analytical method characterizes the healing in an asphalt composite (fine aggregate matrix) as a function of the level of damage before the rest period and the duration of the rest period. The proposed method builds on the viscoelastic continuum damage theory that has been used successfully by other researchers to characterize fatigue cracking in asphalt mixtures. The method is applied to evaluate the healing characteristics of four fine aggregate matrix mixes and is able to quantify the influence of the duration of the rest period and the level of damage preceding the rest period on overall healing. Two verification tests were used to demonstrate that the amount of healing measured by the proposed method was independent of the sequence of loading or rest periods. Results from the initial tests support the hypothesis that the healing characteristics determined with the proposed test method at isothermal conditions can be treated as a characteristic material property.

01457891

12-2540

English

pp 86–96

2012

Transportation Research Record: Journal of the Transportation Research Board

9780309262965

Print

Figures; Photos; References

Asphalt mixtures; Fatigue cracking; Measurement; Temperature; Time duration

Healing (Materials); Viscoelastic continuum damage model

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

TRIS, TRB, ATRI

Feb 8 2012 5:10PM

• Asphalt Pavement Analyzer Used to Assess Rutting Susceptibility of Hot-Mix Asphalt Designed for High Tire Pressure Aircraft
• Calibrating and Validating Overlay Tester–Based Fatigue Cracking Model with Data from National Center for Asphalt Technology
• Characterization of Fracture Properties of Asphalt Mixtures as Measured by Semicircular Bend Test and Indirect Tension Test
• Construction of Dynamic Modulus Master Curves with Resilient Modulus and Creep Test Data
• Determining Damage Development in Hot-Mix Asphalt with Use of Continuum Damage Mechanics and Small-Scale Accelerated Pavement Test
• Development of Autonomous Setup for Evaluating Self-Healing Capability of Asphalt Mixtures
• Effect of Mode of Loading on Viscoelastic and Damage Properties of Asphalt Concrete
• Effects of Oxidative Aging on Asphalt Mixture Properties
• Evaluation of Asphalt Mixture Performance Tester: Utah Experience
• Hot-Mix Asphalt Permanent Deformation Evaluated by Hamburg Wheel Tracking, Dynamic Modulus, and Repeated Load Tests
• Incremental Model for Prediction of Permanent Deformation of Asphalt Concrete in Compression
• Modeling Thermal Stress in Asphalt Mixtures Undergoing Glass Transition and Physical Hardening
• Scanning Laser Detection System Used to Measure Propagation of Fatigue Damage of Asphalt Mixes
• Simplified Viscoelastic Continuum Damage Model as Platform for Asphalt Concrete Fatigue Analysis