A large sample of silt and clay was divided into 9 subsamples, with concentrations increasing from 3 g./l. to 25 g./l. These subsamples were first subjected to the hydrometer analysis, after which they were shaken and re-analyzed by the pipette method. The results of the 2 analyses were then compared. Within a moderate range of silt and clay concentration (6 to 24 g./l.), the analyses gave similar results for the 5phi through 9phi size-grades. With concentrations of less than 6 g./l., the pipette analysis was superior; with concentrations greater than 24 g./l., the hydrometer analysis was more efficient. Within the range of concentrations studied, however, the pipette method gave better overall results.

First Page Preview

First page PDF preview
You do not currently have access to this article.