Abstract： AS 1289.3.6.3:2020 pdf download.Methods of testing soils forengineering purposes Part 3.6.3: Soil classification tests-Determination of the particle size distribution of a soil- Standard method of fine analysis using a hydrometer. 6 Determi...

AS 1289.3.6.3:2020 pdf download.Methods of testing soils forengineering purposes Part 3.6.3: Soil classification

tests-Determination of the particle size distribution of a soil- Standard method of fine analysis using a hydrometer.

6 Determination of factor Fj

6.1 Volume

Determine the volume of the hydromtter bulb (Vh) using one of the following two methods:

(a) From the volume of water displaced —

(I) pour approximately 800 rnL of water Into the graduated I I measuring cylinder, read and record the water level;

(ii) immerse the hydrometer carefully in the water, allow it to float, and again read and record the water level; and

(iii) record, in millilitres, the difference between the two readings as the volume of the hydrometer bulb.

NOTE the error due to inclusion of the stem volume is negligible.

(b From the mass of the hydrometer

(i) determine the mass of the hydrometer to the nearest 0.1 g; and

(ii) record the mass, in grams, as the volume in millilitres of the hydrometer bulb mark. NOTE the error due to Inclusion of the

stem volume is negligible.

6.2 Hydrometer scale

The hydrometer scale shall be determined as follows:

a) Determine the sectional area of the I I cylinder to be used in the test by measuring the distance between two graduations (e.g. 100 ml to 900 ml.).

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