00636329

Component

http://onlinepubs.trb.org...trr/1993/1391/1391-003.pdf

https://scholar.google.co...llin&publication_year=1993

A new apparatus and procedure for the purpose of extracting asphalt binder from hot-mix and pavement samples has been developed. This procedure is the culmination of previous reports on solvents for the extraction of asphalt, the aging of asphalt in solution, and the removal of solvent from asphalt. The apparatus consists of a rotary drum for the purpose of efficient and thorough contacting of the aggregate-binder sample with the solvent, followed by filtration and then solvent removal using a Roto-vap procedure. Intralaboratory tests of the procedure on a variety of samples indicate that the precision associated with one standard deviation is about 6% for extracted asphalt viscosities. This compares with interlaboratory precision of about 30% for previous methods according to the AASHTO Materials Reference Laboratory proficiency sample program. Additionally, this new procedure provides recovered asphalt that has physical properties, such as viscosity, that are much closer to the "true" physical properties of the binder as it existed in the pavement. This is essential if tests performed on the binder are to have any meaning with respect to pavement performance.

This paper appears in Transportation Research Record No. 1391, Asphalt Cement and Asphalt/Polymer Blends. 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

01403229

English

p. 20-29

1993

Transportation Research Record

0309054621

Figures (6) ; References (15) ; Tables (3)

Asphalt; Asphalt pavements; Chemical analysis; Equipment; Hot mix asphalt; Physical properties; Precision; Resource extraction; Samples

Extraction (Chemistry); Recovery

Highways; Materials; I31: Bituminous Binders and Materials

TRIS, TRB, ATRI

Sep 14 1993 12:00AM

• COMPARING FIELD AND LABORATORY AGING OF BITUMENS ON A KINETIC BASIS
• EFFECTS OF PHYSICOCHEMICAL FACTORS ON ASPHALT OXIDATION KINETICS
• EVALUATION AND DEVELOPMENT OF A PRESSURE AGING VESSEL FOR ASPHALT CEMENT
• PREPARATION AND CHARACTERIZATION OF ASPHALT-MODIFIED POLYETHYLENE BLENDS
• SOME ASPECTS OF THE EFFECT OF ASPHALT CHEMICAL COMPOSITION ON MATERIAL BEHAVIOR AND PAVEMENT PERFORMANCE