00669040

Component

http://onlinepubs.trb.org...trr/1994/1436/1436-008.pdf

https://scholar.google.co...Page&publication_year=1994

A laboratory investigation was performed to evaluate a variety of aging processes used for simulating the long-term aging of asphalt binders. Four promising methods investigated in this study include an extended thin film oven test (TFOT), an ultraviolet (UV) chamber, the California tilt oven (CTO), and the pressure aging vessel (PAV). A few conventional asphalts commonly used in Florida and a few modified binders were subjected to these aging processes, and their aged residues were tested for comparison of aging severity. Because of the insensitivity of consistency measurements at lower temperatures, the most sensitive parameter for differentiating the aging severity was found to be the aging index at 60 deg C, which is the ratio of absolute viscosities at 60 deg C. On the basis of this parameter, the relative aging severities of aging processes were established. Various asphalts were found to exhibit different aging severities when subjected to different aging processes. Asphalts from different sources exhibit differentiable degrees of volatile loss when subjected to the extended TFOT. The UV chamber was found to be effective only in aging the surfaces of the binder samples. Low-viscosity asphalts were found to age more in the CTO process. Whereas low-volatile-loss asphalts show less aging in most aging processes, some high-volatile-loss asphalts could age less in the PAV process.

This paper appears in Transportation Research Record No. 1436, Asphalt Concrete Mix Materials. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved

01401249

English

p. 60-70

1994-10

Transportation Research Record

030905513X

Figures (3) ; References (10) ; Tables (8)

Aging (Materials); Asphalt; Binders; Laboratory tests; Oven tests; Pressure vessels; Thin films

Pressure aging vessels; Thin film oven test

Highways; Materials; I31: Bituminous Binders and Materials

TRIS, TRB

Nov 23 1994 12:00AM

• DESIGNING ASPHALT PAVEMENTS FOR EXTREME CLIMATES
• EFFECT OF ANTISTRIP ADDITIVES ON THE PROPERTIES OF POLYMER-MODIFIED ASPHALT BINDERS AND MIXTURES
• EFFECT OF COMPOSITION ON ASPHALT RECYCLING AGENT PERFORMANCE
• EMPIRICAL EVALUATION OF OLIVE HUSK IN ASPHALT CEMENT BINDER AND BITUMINOUS CONCRETE
• EVALUATION AND CHARACTERIZATION OF A RUBBER-MODIFIED HOT MIX ASPHALT PAVEMENT
• EVALUATION AND FIELD VALIDATION OF PROPOSED STRATEGIC HIGHWAY RESEARCH PROGRAM BINDER SPECIFICATION FOR THERMAL CRACKING
• EVALUATION OF NATURAL SANDS USED IN ASPHALT MIXTURES
• IMPROVED LOW-TEMPERATURE FRACTURE PERFORMANCE FOR RUBBER-MODIFIED ASPHALT BINDERS
• INVESTIGATION OF RUTTING OF ASPHALT SURFACE LAYERS: INFLUENCE OF BINDER AND AXLE LOADING CONFIGURATION
• LOW-TEMPERATURE FRACTURE TOUGHNESS OF POLYETHYLENE-MODIFIED ASPHALT BINDERS
• RHEOLOGICAL AND RHEO-OPTICAL CHARACTERIZATION OF ASPHALT CEMENT AND EVALUATION OF RELAXATION PROPERTIES
• SOFTENING OF ASPHALTS IN DILUTE SOLUTIONS AT PRIMARY DISTILLATION CONDITIONS
• STUDY OF THE FATIGUE OF ASPHALT MIXES USING THE CIRCULAR TEST TRACK OF THE LABORATOIRE CENTRAL DES PONTS ET CHAUSSEES IN NANTES, FRANCE
• USE OF RUBBER IN ASPHALT PAVEMENTS: KANSAS EXPERIENCE