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doi:10.2204/iodp.proc.308.205.2008

Hydrometer analysis (MIT)

The prepared suspension was mixed thoroughly with a plunging rod for 1 min. The removal of the plunging rod marked the beginning of the sedimentation process. Two sets of hydrometer readings were obtained for the first 2 min (4, 14, 30, 60, 90, and 120 s) of sedimentation with the hydrometer remaining in the suspension. Readings were recorded to 0.2 of a graduation by estimating five increments between graduations. The slurry was then remixed, and additional readings were made at 2, 4, 8, 16, and 32 min, for up to 2 days. At the end of the experiment, the slurry was poured into an evaporating dish and dried in an oven to obtain the final mass of sediment and dispersing agent. The basic measurements and constants in this method are the same as described for Penn State in Figures F4 and F5, respectively.

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