AS 1289.4.4.1:2017 pdf free download – Methods of testing soils for engineeringpurposes Method 4.4.1:Soil chemical tests— Determination of the electrical resistivity of asoil—Method for fine granular materials

AS 1289.4.4.1:2017 pdf free download – Methods of testing soils for engineeringpurposes Method 4.4.1:Soil chemical tests— Determination of the electrical resistivity of asoil—Method for fine granular materials.
AS 1289.4.4.1 sets out a procedure for the measurement of electrical resistivity of fine granular materials with a maximum particle size of 2.36 mm. This test is used for the quality control of bedding and backfilling materials for cast iron and steel pipe. buried metallic structures and reinforcement. This test does not indicate the corrosion hazards to buried metals as these are largely controlled by the nature of the groundwater.
The compacted density, moisture content and water type all influence the final value. The results obtained using this test method are specific to the conditions created within the method.
2 REFERENCED DOCUMENTS
The following documents arc referred to in this Standard:
AS
1289 Methods of testing soils for engineering purposes
1289.0 Part 0: Definitions and general requirements
1289.2.1.1 Method 2.1.1: Soil moisture content tests Determination of the moisture content of a soil—Oven drying method (standard method)
ISO
3310 Test sievcs— Technical requirements and testing (series)
3 APPARATUS
The following apparatus is required:
(a) A plastic soil box.
NOTE: Sec Figure I.
The box shall be approximately 220 mm long with internal dimensions of 40 mm wide x 30 mm deep. It shall be fitted with plate electrodes at each end and potential measurement pins on one side spaced so that the distance between their axes in centimetres is numerically equal to the cross-sectional area of the box in square centimetres. Potential measuring pins shall span the full width of the box.
(b) A suitable rectangular tamping tool.
(c) An instrument for measuring soil resistance readable and accurate to I f2.
(d) A balance of sufficient capacity with a limit of performance not exceeding 0.5 g.
6 TEST REPORT
The following shall be reported:
(a) The mean resistivity value of the soil in ohm metres (c2.m) and the resistivity of the water to the following accuracy:
(i) Mean resistivity greater than 50 ).m—report to nearest 5 cim.
(ii) Mean resistivity between 10 and 50 Ym—report to nearest 2 .m.
(iii) Mean resistivity less than 10 c.m report to nearest 1.0 !im.
(b) The mean dry density—report to nearest 0.01 tIm3.
(c) The mean moisture content—report to the nearest 0.1%.
(d) Sample identification.
(e) Source of material.
(1) Percentage oversize retained on the 2.36 mm sieve.
(g) Date of sampling.
(h) Soil description.
(i) If a specified water other than distilled water was used.
(j) The number of this Standard. i.e. AS 1289.4.4.1.