INFLUENCE OF GRAIN SHAPE AND SIZE UPON THE LIMITING POROSOTIES OF SANDS

THE STATE OF PACKING OF A MASS OF SAND GRAINS IS DESCRIBED BY ITS RELATIVE POROSITY NR WHICH DEFINES THE PACKING RELATIVE TO MAXIMUM AND MINIMUM POROSITIES OF THE MATERIAL. THESE LIMITING POROSITIES DEPEND IN TURN UPON THE PHYSICAL CHARACTERISTICS OF THE GRAINS THEMSELVES. IN THE RESEARCH DESCRIBED HEREIN, THE INFLUENCE OF GRAIN SHAPE AND SIZE UPON THE LIMITING POROSITIES OF QUARTZ SANDS AND GLASS BALLOTINI WAS STUDIED. THE MAXIMUM POROSITIES WERE DETERMINED BY DEPOSITION OF THE SAMPLE THROUGH WATER AS SUGGESTED BY KOLBUSZEWSKI (1948) WHILE MINIMUM POROSITIES WERE OBTAINED BY VIBRATION UNDER WATER. SHAPE PARAMETERS FOR THE SANDS WERE DETERMINED FROM A CORRELATION BETWEEN THE TIME OF FLOW OF A 0.5-KG SPECIMEN AND THE SPHERICITY MEASURED BY EXAMINATION OF INDIVIDUAL GRAINS. BOTH MAXIMUM AND MINIMUM POROSITIES DECREASED WITH INCREASING SPHERICITY, WHILE TESTS ON GLASS BALLOTINI INDICATED THAT THE EFFECT OF GRAIN SIZE WAS NEGLIGIBLE. THE POROSITY INTERVAL WAS APPROXIMATELY 12.5 PERCENT FOR ALL THE SANDS AND 11 PERCENT FOR SPHERICAL BALLOTINI. MIXTURES OF SAND AND BALLOTINI GAVE REASONABLE AGREEMENT WITH THE TREND SHOWN BY THE SEPARATE MATERIALS. /AUTHOR/

• Supplemental Notes:
  • Presented at the 75th Annual Meeting, Los Angeles, June 25-30, 1972.
• Corporate Authors:

  American Society for Testing and Materials (ASTM)

  100 Barr Harbor Drive, P.O. Box C700
  West Conshohocken, PA  United States  19428-2957
• Authors:
  • Dickin, E A
• Publication Date: 1973-7

Language

• English

Media Info

• Features: Figures; Photos; References; Tables;
• Pagination: p. 113-120
• Serial:
  • ASTM Special Technical Publications
  • Issue Number: 523
  • Publisher: American Society for Testing and Materials (ASTM)

Subject/Index Terms

• TRT Terms: Glass beads; Grain size; Measurement; Particles; Porosity; Sand; Shape; Vibration
• Uncontrolled Terms: Particle size distribution; Sphericity
• Old TRIS Terms: Particle shapes
• ITRD Terms: 4548: Glass shot; 6136: Measurement; 6200: Particle size distribution; 5938: Porosity; 4105: Sand; 9073: Shape; 5558: Vibration
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00080557
• Record Type: Publication
• Source Agency: Transport and Road Research Laboratory (TRRL)
• Report/Paper Numbers: Conf Paper, A
• Files: ITRD, TRIS
• Created Date: Feb 27 1975 12:00AM