01372820

Component

https://doi.org/10.3141/2296-14

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

Fatigue damage is a major distress in pavements that has been studied extensively in various approaches, over the past two decades. It is therefore well recognized that measuring fatigue damage accumulation is difficult, time-consuming, and in many cases highly variable. Better methods for monitoring the progression of damage are thus needed for asphalt mixtures because of their heterogeneity and inherited variability. The primary objective of this research was to develop a scanning laser system that would detect changes in surface properties for the purposes of monitoring damage and characterizing the fatigue behavior of asphalt mixtures. This technique characterizes the surface state with a defect frequency parameter by rapidly scanning a laser beam along the specimen. Results were found to correlate quite well with data from other traditional mechanical tests (50% reduction in stiffness) and estimated dissipated energy approaches. This laser system is believed to offer many advantages for testing asphalt mixtures as compared with the conventional mechanical systems. The new approach provides the opportunity to quantify the microcrack formation rate and to evaluate the fatigue performance of asphalt mixtures without the need for fixtures on the sample. This system also has the potential of being used in situ for pavement monitoring.

01457891

12-4474

English

pp 135–143

2012

Transportation Research Record: Journal of the Transportation Research Board

9780309262965

Print

Figures; Photos; References; Tables

Asphalt mixtures; Fatigue (Mechanics); Lasers; Microcracking; Monitoring; Pavement distress

Scanning lasers

Highways; Materials; Pavements; I23: Properties of Road Surfaces; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Feb 8 2012 5:24PM

• 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
• Method to Quantify Healing in Asphalt Composites by Continuum Damage Approach
• Modeling Thermal Stress in Asphalt Mixtures Undergoing Glass Transition and Physical Hardening
• Simplified Viscoelastic Continuum Damage Model as Platform for Asphalt Concrete Fatigue Analysis