01024807

Component

https://doi.org/10.3141/1970-03

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

The loss of physical adhesion between the aggregate and the asphalt binder is one of the important mechanisms that accelerate moisture damage in hot-mix asphalt pavements. In this study, two parameters related to bond energy—adhesive bond energy between the aggregate and the asphalt and reduction of free energy when asphalt debonds from the aggregate surface in the presence of moisture—were quantified with surface energies of both materials. Threshold values of these parameters to identify asphalt–aggregate combinations susceptible to premature moisture damage were derived by comparison of the values of these parameters with observed field performance for several mixes. Results show significant differences in bond energies developed between various aggregates and a given binder. This finding illustrates the importance of binder–aggregate compatibility and the sensitivity of calculated bond strength to surface energy measurements. Asphalt binders from different sources with the same performance grade were also found to develop different bond energies with any given aggregate. The results show that binders differ in their sensitivity to changes in aggregate source in terms of the developed bond energy. The methodology of using surface energy and concomitant bond energy calculations to assess the moisture sensitivity of asphalt concrete mixes is discussed as well as the advantages of using this technique compared with conventional mechanical tests.

01038330

English

pp 3-13

2006

Transportation Research Record: Journal of the Transportation Research Board

030909979X

Print

Figures (5) ; References (17) ; Tables (6)

Adhesion; Adhesive strength; Aggregates; Asphalt concrete; Binders; Bituminous binders; Bond strength (Materials); Hot mix asphalt; Moisture damage; Surface energy

Moisture sensitivity

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

TRIS, TRB, ATRI

Mar 3 2006 10:41AM

• 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
• 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 Analyses for Measurement and Prediction of Hot-Mix Asphalt Fracture Energy
• 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