COMPOSITION STUDIES ON ASPHALT CEMENTS- A PROGRESS REPORT

A BRIEF REVIEW IS PRESENTED OF PERTINENT INFORMATION LEADING TO THE DEVELOPMENT OF A NEW ADSORPTION PROCEDURE FOR THE SEPARATION OF THE PETROLENES EXTRACT OBTAINED FROM A NORMAL HEXANE EXTRACTION OF ASPHALT CEMENTS. THE PROPERTIES OF THE RECOVERED FRACTIONS WERE STUDIED FOR DENSITY, REFRACTIVE INDEX, CARBON-HYDROGEN RATIO AND SULFUR CONTENTS. THESE VALUES WERE UTILIZED IN EVALUATION OF THE CARBON DISTRIBUTION BY CHEMICAL FORM. A COMPARISON WAS SHOWN OF THESE EVALUATIONS FOR TWELVE SELECTED ASPHALT CEMENTS OF 85- 100 PENETRATION OBTAINED FROM VARIOUS SOURCES, AND A PARTIAL EVALUATION OF THE SAME TYPE WAS MADE ON TWELVE DIFFERENT AC- 20 ASPHALTS FROM THE BPR STUDY GROUP OF ASPHALT CEMENTS. THE MATERIAL IS A PROGRESS REPORT TO PRESENT DATA OF INTEREST TO OTHER PEOPLE WORKING WITH SIMILAR ASPHALTS OR WITH THE SAME ASPHALTS OF THE BPR STUDY GROUP. A STUDY WAS MADE TO EVALUATE THE CHEMICAL STRUCTURES THAT ARE OBTAINED FOR THE FOUR DIFFERENT COMPONENTS SEPARATED BY THE PRESCRIBED TECHNIQUE. THESE FOUR COMPONENTS ARE DESIGNATED AS PARAFFINIC-NAPHTHENIC (PN), LIGHT AROMATIC (LA), HEAVY AROMATIC (HA) AND HEXASPHALTENES (HX). IT WAS FOUND THAT THE VAN NES-VAN WESTEN METHOD HAD LIMITATIONS PROBABLY BECAUSE OF ITS EMPIRICAL NATURE, BUT THE CORBETT DENSIMETRIC PROCEDURE WAS SOMEWHAT MORE USEFUL. A LIMITED COMPARISON OF DATA AVAILABLE AT THIS TIME ON THE BPR AC-20 SAMPLES WITH THAT BY THE ROSTLER METHOD IS GIVEN. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1967/178/178-002.pdf
• Supplemental Notes:
  • Paper sponsored by Committee on Characteristics of Bituminous Materials and presented at the 46th Annual Meeting. 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.
• Authors:
  • Schweyer, Herbert E
  • Chipley, Edmund L
• Publication Date: 1967

Media Info

• Media Type: Digital/other
• Features: Appendices; Figures; References; Tables;
• Pagination: pp 30-59
• Monograph Title: Bituminous materials, mixes and construction
• Serial:
  • Highway Research Record
  • Issue Number: 178
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Adsorption; Alternatives analysis; Asphalt additives; Asphalt cement; Chemical analysis; Chemical composition; Density; Malthene; Materials selection; Methodology; Paraffin; Pendulum tests; Refractivity; Sulfur; Test procedures
• Uncontrolled Terms: Separation
• Old TRIS Terms: Aromatic component /asphalt/; Carbon hydrogen ratio; Hexane extraction; Hexasphaltenes; Paraffinic component /asphalt/; Petrolene component /asphalt/; Rostler method
• Subject Areas: Highways; Materials;

Filing Info

• Accession Number: 00210614
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Sep 5 1994 12:00AM