01024588

Component

https://doi.org/10.3141/1970-22

http://scholar.google.com...aldi&publication_year=2006

A verification of fracture energy density is presented as a fundamental fracture threshold in hot-mix asphalt. Fracture energy density was evaluated with the semicircular bending (SCB) test. Experimental analyses were enhanced by a digital image correlation system capable of providing a dense and accurate displacement–strain field of composite materials at the microstructural level and suitable for describing the cracking behavior of materials at crack initiation. The resulting fracture behavior in the SCB was predicted with a displacement discontinuity method to explicitly model the microstructure of asphalt mixtures and to predict their fracture energy density. The input parameters for the displacement discontinuity micromechanical model of the SCB were obtained from the Superpave® indirect tensile test. The predicted crack initiation and crack propagation patterns are consistent with observed cracking behavior. The results also imply that fracture in mixtures can be modeled effectively with a micromechanical approach that allows for crack growth both along aggregate surfaces and through aggregates. Finally, the results presented lead to the promising statement that fracture energy density for mixtures is a fundamental fracture threshold and can be both consistently measured and predicted for different laboratory test configurations.

01038330

English

pp 186-195

2006

Transportation Research Record: Journal of the Transportation Research Board

030909979X

Print

Figures (9) ; References (10) ; Tables (1)

Aggregates; Asphalt mixtures; Cracking; Fracture mechanics; Fracture properties; Hot mix asphalt; Superpave

Digital image correlation; Fracture energy density; Micromechanical behavior; Semi circular bend test

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

TRIS, TRB

Mar 3 2006 10:53AM

• Comparing Resilient Modulus and Dynamic Modulus of Hot-Mix Asphalt as Material Properties for Flexible Pavement Design
• Computational Model to Predict Fatigue Damage Behavior of Asphalt Mixtures Under Cyclic Loading
• Determination of Asphalt Concrete Complex Modulus with Impact Resonance Test
• Dissipated Energy Approach to Study Hot-Mix Asphalt Healing in Fatigue
• Establishment of Precision of Dynamic Angle Validation Kit with Hot-Mix Simulator for Superpave Gyratory Compactors
• Evaluation of Effect of Heat-Adhesive Emulsions for Tack Coats with Shear Test: From the Road Research Laboratory of Barcelona
• Evaluation of Hamburg Wheel-Tracking Device Test with Laboratory and Field Performance Data (With Discussion and Closure)
• Evaluation of Healing Property of Asphalt Mixtures
• Evaluation of Testing Protocols for Dynamic Modulus of Hot-Mix Asphalt
• Investigating Pavement Cracking: Evolutionary Modular Neural Network Approach
• Limits on Adhesive Bond Energy for Improved Resistance of Hot-Mix Asphalt to Moisture Damage
• Long-Term Effectiveness of Antistripping Additives: Laboratory Evaluation
• Measurements of Moisture Suction and Diffusion Coefficient in Hot-Mix Asphalt and Their Relationships to Moisture Damage
• Mechanical Mixture Simulation Devices for Determining and Calibrating Internal Angle of Gyration in Superpave Gyratory Compactor
• Micromechanical Modeling Approach to Predict Compressive Dynamic Moduli of Asphalt Mixtures Using the Distinct Element Method
• New Laboratory Equipment for Study of Reflective Cracking in Asphalt Overlays
• Observation of Crack Propagation in Asphalt Mixtures Using Acoustic Emission
• Pavement Design Analysis with 2002 Design Guide Software
• Permanent Deformation Analysis of Hot-Mix Asphalt Mixtures Using Simple Performance Tests and 2002 Mechanistic-Empirical Pavement Design Software
• Simple Method for Predicting Laboratory and Field Permeability of Hot-Mix Asphalt
• Transitioning from Texas Gyratory Compactor to Superpave Gyratory Compactor
• Uniaxial Penetration Testing for Shear Resistance of Hot-Mix Asphalt Mixtures