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SURFACE FREE ENERGY MEASUREMENT OF AGGREGATES AND ITS APPLICATION TO ADHESION AND MOISTURE DAMAGE OF ASPHALT-AGGREGATE SYSTEMS
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2001
Year
Unknown Venue
Materials ScienceSurface Free EnergyPavement EngineeringHighway PavementEngineeringSurface EnergyCivil EngineeringMechanical EngineeringUniversal Sorption DeviceAsphalt PavementCement-based Construction MaterialMechanics Of MaterialsAsphalt Binder
A protocol for measuring the thermodynamic surface free energy of aggregates using the Universal Sorption Devices is presented. Surface free energy, which is the reflection of material surface physical chemistry characteristics, can be used to evaluate adhesive fracture and moisture damage characteristics within the asphalt-aggregate system. Three widely used aggregates were tested using the Universal Sorption Device. The materials possessed very different surface free energies. By knowing the surface energy of the asphalt and aggregates, the most compatible asphalt-aggregate combination can be selected that will increase the ability of the asphalt pavement to resist adhesive fatigue fracture and moisture damage and maximize fracture healing.