01044218

Component

https://doi.org/10.3141/2001-05

http://scholar.google.com...asad&publication_year=2007

Conventional methods to quantify the moisture sensitivity of asphalt mixtures are based on the comparison of mechanical properties of the mix before and after a moisture-conditioning process. Although this approach consolidates the effect of material and mixture properties on moisture sensitivity, it does not identify the causes responsible for the poor or good performance of the mixture. In this study, surface free energy of asphalt binders and aggregates was used to derive energy parameters that quantify the moisture sensitivity of various combinations of materials. The moisture sensitivity of 12 asphalt mixtures carefully designed to represent a wide range of asphalt–aggregate interactions was measured in the laboratory under controlled conditions. Test results indicate that the moisture sensitivity of these mixtures correlates well with the energy parameters, which are based on the surface energy properties of the constituent materials. Incorporating the specific surface area of the aggregate into the energy parameters improved this correlation. The proposed energy parameters have the potential to serve as an effective tool by which to select material combinations that result in asphalt mixtures that are more resistant to moisture-induced damage.

01082338

English

pp 37-45

2007

Transportation Research Record: Journal of the Transportation Research Board

9780309104272

Print

Figures (5) ; Photos (2) ; References (17) ; Tables (5)

Aggregates; Asphalt mixtures; Bituminous binders; Moisture damage; Surface energy

Aggregate binder interaction; Moisture sensitivity

Geotechnology; Highways; Materials; I31: Bituminous Binders and Materials; I36: Aggregates

TRIS, TRB, ATRI

Feb 8 2007 6:13PM

• Bulk Specific Gravity Measurements of 25.0-mm and 37.5-mm Coarse-Graded Superpave Mixes
• Development of New Moisture-Conditioning Procedure for Hot-Mix Asphalt
• Effect of Binder Type, Aggregate, and Mixture Composition on Fracture Energy of Hot-Mix Asphalt in Cold Climates
• Estimating Directional Permeability of Hot-Mix Asphalt by Numerical Simulation of Microscale Water Flow
• Evaluating Georgia’s Compaction Requirements for Stone Matrix Asphalt Mixtures
• Hot-Mix Asphalt Mixtures for Nevada's Intersections
• Long-Term Performance of Superpave in Specific Pavement Study 9A
• Moisture Susceptibility of Asphalt Mixtures with Known Field Performance: Evaluated with Dynamic Analysis and Crack Growth Model
• New Predictive Models for Viscosity and Complex Shear Modulus of Asphalt Binders: For Use with Mechanistic–Empirical Pavement Design Guide
• Optimum Number of Superpave Gyrations Based on Project Requirements
• Overlay Tester: A Simple Performance Test for Fatigue Cracking
• Predicting the Resilient Modulus of Asphalt Concrete from the Dynamic Modulus
• Prediction of Fatigue Cracking in Asphalt Pavements: Do We Follow the Right Approach?
• Quantification of Effect of Polymer-Modified Asphalt on Flexible Pavement Performance
• Rational Modeling of Tertiary Flow for Asphalt Mixtures
• Sample Size Requirements for Field Permeability Measurements of Hot-Mix Asphalt Pavements
• Spanish Experience with Gyratory Compactor and Indirect Tensile Test in Design and Control of Cold Recycled Asphalt Pavement