Grain Size DistributionsA grain size distribution plot is a special purpose graph generally used to depict the results of a sieve analysis, commonly known as a "gradation test". The sieve analysis determines the gradation (the distribution of aggregate particles, by size, within a given sample) in order to determine compliance with design, production control requirements, and verification specifications. Typically a grain size distribution plot shows grain sizes in millimeters on the X axis with a reversed (largest-to-smallest) logarithmic scale: DPlot shows material classifications below the X axis, using either the
AASHTO (American Association of State Highway and Transportation Officials)
designations or the Udden-Wentworth scale:
Sieve sizes are shown along the top of the graph using AASHTO-standard sizes as shown above, or British standard sieve sizes: You can allow DPlot to automatically pick which sieve size labels to display, or pick and choose which ones you want, from a list of standard ASTM sizes: ... or British sieve sizes: See also: |
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