Visual accumulation tube for size analysis of sands
Journal of the Hydraulics Division of the American Society of Civil Engineers
By: B.C. Colby and R.P. Christensen
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Abstract
The visual-accumulation-tube method was developed primarily for making size analyses of the sand fractions of suspended-sediment and bed-material samples. Because the fundamental property governing the motion of a sediment particle in a fluid is believed to be its fall velocity. the analysis is designed to determine the fall-velocity-frequency distribution of the individual particles of the sample. The analysis is based on a stratified sedimentation system in which the sample is introduced at the top of a transparent settling tube containing distilled water. The procedure involves the direct visual tracing of the height of sediment accumulation in a contracted section at the bottom of the tube. A pen records the height on a moving chart. The method is simple and fast, provides a continuous and permanent record, gives highly reproducible results, and accurately determines the fall-velocity characteristics of the sample. The apparatus, procedure, results, and accuracy of the visual-accumulation-tube method for determining the sedimentation-size distribution of sands are presented in this paper.
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Visual accumulation tube for size analysis of sands |
| Series title | Journal of the Hydraulics Division of the American Society of Civil Engineers |
| Volume | 82 |
| Issue | HY3 |
| Year Published | 1956 |
| Language | English |
| Publisher | American Society of Civil Engineers |
| Description | Paper 1004; 17 p. |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Journal of the Hydraulics Division of the American Society of Civil Engineers |
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