EFFECTS OF AGGREGATE SIZE, SHAPE, AND SURFACE TEXTURES ON THE PROPERTIES OF BITUMINOUS MIXTURES - A LITERATURE SURVEY

THE LITERATURE SURVEY WAS MADE ON BITUMINOUS PAVING MIXTURES TO EVALUATE THE FUNCTION OF NATURAL AGGREGATES AND CRUSHED AGGREGATES IN THE MIXTURE. OPINIONS AND CONCLUSIONS REGARDING THE EFFECTS OF AGGREGATE SIZE AND GRADATION ON THE CHARACTERISTICS OF BITUMINOUS MIXTURES ARE NOT COMPLETELY CONSISTENT. HOWEVER, IT IS AGREED THAT THE MAXIMUM SIZE OF AN AGGREGATE IS IMPORTANT WITH REGARD TO SKID RESISTANCE OF THE PAVEMENT, THE PERCENTAGE ASPHALT NEEDED IN THE MIXTURE, AND THE WORKABILITY AND ECONOMY OF THE MIXTURE. AGGREGATE GRADATION AND SIZE RANGE INFLUENCE THE STRENGTH AND STIFFNESS CHARACTERISTICS OF THE MIXTURE, PERMEABILITY, ASPHALT CONTENT, ECONOMY, WORKABILITY, AND SKID RESISTENCE. AGGREGATE SHAPE IS DISCUSSED IN THE LITERATURE PRIMARILY IN TERMS OF DIFFERENCES BETWEEN NATURAL AGGREGATES (GRAVELS AND SANDS) AND CRUSHED AGGREGATES (CRUSHED GRAVEL OR CRUSHED STONE). THE LITERATURE INDICATES THAT THE SHAPE OF THE AGGREGATE HAS AN APPRECIABLE EFFECT ON THE PHYSICAL PROPERTIES OF THE MIXTURE, ON THE PROPER ASPHALT CONTENT, AND ON THE VOIDS RELATIONSHIP. THE GENERALLY ACCEPTABLE PRINCIPLE THAT THE SHAPE OF THE COARSE AGGREGATE IS CRITICAL WITH REGARD TO PROPERTIES OF GRADED MIXTURES SEEMS TO APPLY ONLY TO OPEN-GRADED MIXTURES. THE LITERATURE INDICATES THAT THE CHARACTERISTICS OF THE FINE AGGREGATE FRACTION ARE DOMINANT FOR DENSE-GRADED MIXTURES. AGGREGATE SHAPE IS ALSO IMPORTANT IN ITS EFFECT ON SKID RESISTANCE. THE EFFECT OF SURFACE TEXTURE IS OFTEN RELATED TO GRADING IN ITS INFLUENCE ON THE STABILITY OF AGGREGATES.

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/sr/sr109/109-003.pdf
• Supplemental Notes:
  • 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:
  • Benson, Fred J
• Conference:
  • 47th Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1968-1-15 to 1968-1-19
• Publication Date: 1970

Media Info

• Media Type: Print
• Features: References;
• Pagination: pp 12 - 22
• Monograph Title: EFFECTS OF AGGREGATE SIZE, SHAPE, AND SURFACE TEXTURE ON PROPERTIES OF BITUMINOUS MIXTURES
• Serial:
  • Highway Research Board Special Report
  • Issue Number: 109
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Aggregate gradation; Aggregates; Aggregates by shape and surface texture; Asphalt content; Bituminous mixtures; Fine aggregates; Grain size (Geology); Open graded aggregates; Physical properties; Reviews; Skid resistance; Stability (Mechanics); Stiffness; Texture; Void ratios
• Uncontrolled Terms: Aggregate shape; Particle size distribution
• Old TRIS Terms: Void
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00211484
• Record Type: Publication
• Files: TRIS, TRB, ATRI
• Created Date: Jul 21 1970 12:00AM