AS 1289.6.6.1:2020 pdf free

09-04-2021 comment

AS 1289.6.6.1:2020 pdf free.Methods of testing soils for engineering purposes Method 6.6.1: Soil strength and consolidation tests – Determination of the one-dimensional consolidation properties of a soil – Standard method.
7 Procedure
The procedure shall be conducted as follows:
(a) Dampen the porous plates as necessary to minimize any tendency to absorb water from the specimen. Assemble the consolidation cell with ring, specimen, filter paper on either side of the specimen and porous plates. Position the loading plate on top of the specimen.
(b) Place the consolidation cell in the loading device, set the dial gauge, record the reading, and then apply a small seating pressure.
NOTE 1 A seating pressure of 6.25 kPa ± 1 kPa is recommended for typical apparatus and soil. For very soft soils a seating pressure of 3 kPa or less may be used.
(c) Inundate the specimen with water.
NOTE 2 Inundation procedures vary depending on the soil consistency and moisture content. Inundate the specimen at the start of the test unless otherwise specified by the client. Specimens may be inundated at times or loads other than at the beginning of the test. Any resulting effects, such as expansion or increased settlement, should be noted in the test report.
In the case of unsaturated soils, inundation may not be necessary, and the test would be carried out under conditions that minimize the loss of moisture by evaporation from within and around the specimen.
(d) Apply the first loading pressure and record the change in thickness of the specimen at the following time intervals: 7.5, 15, and 30 s; 1, 2, 4, 8, 16 and 32 mm; 1, 2, 4, 8, and 24 h. The following loading pressure increments shall he used as the normal test range unless otherwise specified:
(i) Loading pressure increments: 6.25, 12.5, 25. 50, 100, 200, 400, and 800 (kPa).
(ii) Unloading pressure increments: 200 and 50 (kPa).
NOTE 3 Swelling of specimen: lithe specimen swells on inundation, increase the pressure to the next higher value in the series. If swelling continues, increase the pressure to the next applied pressure increment until the sample begins to consolidate.AS 1289.6.6.1 pdf download.

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