ORIENTATION OF PARTICLES WITH SPECIAL REFERENCE TO BITUMINOUS PAVING MATERIALS

A METHOD IS DESCRIBED FOR MEASURING PARTICLE ORIENTATION IN BITUMINOUS MIXTURES AND FOR ANALYZING THE DATA BY STATISTICAL TECHNIQUES TO DETERMINE THE EXISTENCE AND DEGREE OF PREFERRED ORIENTATION. SAMPLES PREPARED BY ALTERNATIVE LABORATORY COMPACTIVE PROCEDURES ARE COMPARED WITH EACH OTHER AND WITH THE COMPACTIVE EFFORT OF A FIELD ROLLER IN RESPECT TO THE DEGREE OF PREFERRED ORIENTATION. THE CONCLUSION IS DRAWN THAT FOR THE PARTICULAR MIX EXAMINED, GIVEN NUMBER OF PASSES OF A FIELD ROLLER CAN BE EQUATED WITH A CERTAIN NUMBER OF PASSES OF A LABORATORY ROLLER THAT ACHIEVES THE SAME DEGREE OF ORIENTATION. THIS STRUCTURAL ELEMENT OF THE FIELD SPECIMEN IS CONFIRMED TO BE MORE CLOSELY SIMULATED BY USING THE LABORATORY ROLLER FOR SPECIMEN COMPACTION THAN BY USING STATIC COMPACTION. THE RELATIONSHIP BETWEEN PREFERRED ORIENTATION AND SAMPLE ANISOTROPY AS REVEALED BY STRENGTH TESTS IN MUTUALLY PERPENDICULAR DIRECTIONS IS DISCUSSED. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1969/273/273-006.pdf
• Supplemental Notes:
  • Paper sponsored by Committee on Mechanical Properties of Bituminous Paving Mixtures. 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:
  • Lees, G
  • Salehi, M
• Publication Date: 1969

Media Info

• Media Type: Digital/other
• Features: Figures; References; Tables;
• Pagination: pp 63-75
• Monograph Title: Bituminous materials and mixes
• Serial:
  • Highway Research Record
  • Issue Number: 273
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Anisotropy (Physics); Bituminous mixtures; Compaction; Compression tests; Rollers; Statistical analysis
• Uncontrolled Terms: Laboratory compaction; Particle size distribution
• Old TRIS Terms: Anisotropy; Compressive strength tests; Orientation /particles/; Roller coverage
• Subject Areas: Data and Information Technology; Highways; Materials;

Filing Info

• Accession Number: 00211437
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: Sep 29 1994 12:00AM