Full TGIF Record # 70987
Item 1 of 1
Publication Type:
Content Type:Abstract or Summary only
Author(s):Li, D.; Christians, N. E.; Minner, D. D.
Author Affiliation:Iowa State University
Title:Quantitative evaluation of sand shape and roundness
Section:Turfgrass science
Other records with the "Turfgrass science" Section
Meeting Info.:Minneapolis, MN: November 5-9, 2000
Source:2000 Annual Meeting Abstracts [ASA/CSSA/SSSA]. 2000, p. 157.
Publishing Information:[Madison, WI]: American Society of Agronomy, Crop Science Society of America, Soil Science Society of America
# of Pages:1
Keywords:TIC Keywords: Sand; Physical properties of soil; Analytical methods; Particle size
Abstract/Contents:"Sand shape and roundness may have an influence on the stability of sand-based media. Our knowledge about the effects of particle shape on the physical properties of sand media has been based on either a qualitative, one-dimensional image analysis, or on an indirect index such as penetrometer readings. The objective of this study was to establish a method for quantitative description of particle shape and roundness. From geometry we know that a perfectly round object has the lowest surface to volume ratio, whereas a round-object with rough surface, an irregular three-dimensional object, or a sheet will have high surface to volume ratios. The volume of a sand particle can be easily derived. We define the spherical index (Is) of a particle as S/Sb, where S is the true surface area of the particle and Sb is surface area of a sphere with the same volume. To do this, samples are treated with aniline blue dye that adsorbs to the particle surface. The dye is then removed from the particles and surface area is derived by comparing the light absorption of the dye solution to that removed from glass beads of known surface area. In this study, we determined the surface area of crushed glass and angular sand. We found that within a particle-size range of 0.5 to 1.0 mm, the crushed glass and the sand sample had spherical indices of 2.5 and 1.7, respectively. We also found that as particle-size became smaller, the spherical index decreased."
Note:This item is an abstract only!
ASA/CSSA/SSSA Citation (Crop Science-Like - may be incomplete):
Li, D., N. E. Christians, and D. D. Minner. 2000. Quantitative evaluation of sand shape and roundness. Annu. Meet. Abstr. p. 157.
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MSU catalog number: S 1 .A58
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