00936054

Component

https://doi.org/10.3141/1810-06

http://scholar.google.com...lste&publication_year=2002

Cohesive and adhesive bonding within the asphalt-aggregate system are directly related to the surface energy of the asphalt. The thermodynamic changes in the surface energy of adhesion and cohesion are related to the de-bonding of the interface between asphalt and aggregate and to cracks that may occur within the mastic, respectively. However, it is also true that thermodynamic changes in the surface energy are required to heal a fracture between the surfaces of the asphalt and the aggregate or within the mastic. The methodology and testing protocol for measuring the surface energy of asphalt are presented. Both the surface energy of dewetting (fracture) and the surface energy of wetting (healing) can be obtained from the contact angle measurement with the Wilhelmy plate method. Ten asphalts were tested; surface energies varied substantially as a function of asphalt composition and the level of aging to which the asphalt was subjected. By using thermodynamic theory, the adhesion and cohesion bonding energy within the asphalt-aggregate systems were further analyzed. This analysis has the potential to select the most compatible asphalt-aggregate combination for mixtures. The surface energy is also a very important parameter in the fatigue and healing analysis of the asphalt pavement.

This paper appears in Transportation Research Record No. 1810, Bituminous Binders 2002.

English

p. 44-53

2002

Transportation Research Record

0309077362

Figures (5) ; References (24) ; Tables (5)

Adhesion; Asphalt; Asphalt mixtures; Bonding; Cohesion; Debonding; Fatigue (Mechanics); Surface energy; Thermodynamics

Healing (Materials)

Highways; Materials; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Jan 3 2003 12:00AM

• DEVELOPMENT OF A STIRRED AIRFLOW TEST PROCEDURE FOR SHORT-TERM AGING OF ASPHALTIC MATERIALS
• EFFECT OF HYDRATED LIME ON LONG-TERM OXIDATIVE AGING CHARACTERISTICS OF ASPHALT
• EFFECT OF VARIOUS AGING TECHNIQUES ON ASPHALT LOW-TEMPERATURE PROPERTIES
• IMPACT OF DIFFERENT TYPES OF MODIFICATION ON LOW-TEMPERATURE TENSILE STRENGTH AND TCRITICAL OF ASPHALT BINDERS
• MEASURING AND DEFINING FATIGUE BEHAVIOR OF ASPHALT BINDERS
• PERFORMANCE-GRADED BINDER SPECIFICATION FOR SURFACE TREATMENTS
• STATISTICAL DISTRIBUTION OF FAILURE STRESS VALUES FROM SUPERPAVE (REGISTERED TRADEMARK) DIRECT TENSION TEST
• ZERO SHEAR VISCOSITY OF ASPHALT BINDERS (WITH DISCUSSION AND CLOSURE)