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Density and Specific Gravity Instruments:

Density and specific gravity instruments are meters used to determine density and specific gravity.

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Gilson offers three types of vacuum pycnometers to determine maximum specific gravity. All three feature a transparent cover for observation of bubble release during testing. Standard components include vacuum hose,...
Gilson offers two types of ASTM soil hydrometers. The SA-1 (ASTM 151 H) is graduated to read specific gravity, with a range of 0.995-1.038 in 0.001 divisions at 68°F (20°C).
Soundness testing of aggregate requires repeated immersion cycles in sodium or magnesium sulfate solution, followed by drying. Rehydration of the salts simulates expansion of freezing water. Samples are then washed,...

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