00803829

Component

https://doi.org/10.3141/1728-06

http://scholar.google.com...Hesp&publication_year=2000

The results of low-temperature fracture testing of a large number of both regular and modified asphalt binders are discussed. Two Strategic Highway Research Program (SHRP) binders (Materials Reference Library Codes AAG-2 and AAN) were evaluated with 5% by weight of a variety of commonly used polymer modifiers. Specimens of three different sizes were tested in a three-point bend configuration, both with and without a notch. The original SHRP effort was aware of the need for a rigorous fracture mechanics-type binder test, but because of a lack of time and resources, only the bending beam rheometer and the direct tension test were ultimately developed. Some of the differences between failure strain and fracture toughness measurements are discussed, as well as how these differences may relate to pavement performance. The results of this study demonstrate that there is a large range of notch sensitivities and fracture energies for different polymer-modified binders, suggesting that the ductile-to-brittle transition (as measured with the direct tension test) may not be a totally reliable performance indicator. Fracture energy may be a better choice, since it combines the notched strength with a stiffness to yield a true material property that is independent of sample size and configuration.

This paper appears in Transportation Research Record No. 1728, Asphalt Binders 2000.

English

p. 36-42

2000

Transportation Research Record

0309067316

Figures (6) ; References (27) ; Tables (1)

Bituminous binders; Fracture tests; Low temperature tests; Pavement performance; Polymer asphalt; Strain (Mechanics); Tension tests

Strategic Highway Research Program

Fracture energy

Highways; Materials; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Dec 7 2001 12:00AM

• CRACK PINNING IN ASPHALT MASTIC AND CONCRETE: REGULAR FATIGUE STUDIES
• DAMPING OF SHEAR VIBRATIONS IN ASPHALT MODIFIED WITH STYRENE-BUTADIENE-STYRENE POLYMER
• DISTRIBUTION OF STRAINS WITHIN HOT-MIX ASPHALT BINDERS: APPLYING IMAGING AND FINITE-ELEMENT TECHNIQUES
• EFFECT OF FILM THICKNESS ON RHEOLOGICAL BEHAVIOR OF ASPHALT BINDERS
• ESTABLISHING LINEAR VISCOELASTIC CONDITIONS FOR ASPHALT BINDERS
• EVALUATION OF MOISTURE SUSCEPTIBILITY OF ASPHALT MIXTURES: CONVENTIONAL AND NEW METHODS
• FACTORS AFFECTING VARIABILITY IN STRATEGIC HIGHWAY RESEARCH PROGRAM BINDER TESTS
• FIELD VALIDATION OF NEW SUPERPAVE LOW-TEMPERATURE BINDER SPECIFICATION PROCEDURE: PERFORMANCE DATA FROM PENNSYLVANIA TEST SECTIONS
• NEW CLASS OF REACTIVE POLYMER MODIFIERS FOR ASPHALT: MITIGATION OF LOW-TEMPERATURE DAMAGE
• NEW CLASS OF REACTIVE POLYMER MODIFIERS FOR ASPHALT: MITIGATION OF MOISTURE DAMAGE