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ISO 17892-3:2015 pdf free

ISO 17892-3:2015 pdf free.Geotechnical investigation and testing一Laboratory testing of soil
Place the pycnometer in the water bath, or in the temperature-controlled room or cabinet.
Record the temperature. If using a water bath, only the neck, the stopper; and the capillary rising tube of the pycnometer should emerge above the surface of the water in the bath. Leave the pycnometer in the water bath until the control fluid temperature is equal to that of the water bath, a minimum of 1 h should be allowed. If a temperature-controlled room or cabinet is used, a much longer period will be required for temperature equilibration, a minimum of 16 h should be allowed.
Check the level of the control fluid in the pycnometer and add or remove fluid when necessary. Depending on the type of pycnometer, the level of the fluid should be at the top of the capillary.
If using a water bath, take the pycnometer out and immediately dry its external surfaces.
Without delay, determine the total mass of the pycnometer filled with control fluid, to the nearest 0,01 g or 0,1 % of the weighed soil mass, whichever is greater (m1).
NOTE Excessive time delay or excessive handling once the pycnometer is removed from the temperature-controlled environment can result in a significant loss of fluid due to thermal expansion.
The specimen may be oven-dried or tested moist. If oven-dried, the sample should be dried in accordance with ISO 17892-1.
The selected specimen shall be representative of the soil, shall have a dry mass of at least 10 g and shall pass through a 4 mm sieve (or nearest equivalent) if using a 50 ml pycnometer. If larger particles are present, they may be crushed to meet the 4 mm limit, or a larger capacity pycnometer shall be used with a correspondingly larger sample. In either case, care should be taken to break down aggregations of oven dried fine soils with the mortar and pestle to release individual particles before testing.ISO 17892-3 pdf download.

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