Aim: To determine Water Content in Soil Sample at Laboratory by Oven Method
Container Any suitable non corrodible air tight container. (Remarks- These can be 300ml aluminum or stainless steel boxes with lid). Balance â Having accuracy of 0.04% of the weight of soil taken for test. Remarks- Balance of capacity 500 g and accuracy of 0.1g can be used when accurate working is required. If normal weighing balance with 1g accuracy is used then accuracy of water content will be around 0.2 to 0.5% only; depending on sample size 500 to 200 g respectively. Drying Oven
It shall be true representative of soil mass. The size of specimen is recommended for general laboratory use as below. However, the dryer the soil, greater shall be size. Remarks: Preferably take 500g sample when weighing accuracy is 1g.
|Size of particles, mm More than 90% passing||37.5||19||9.5||4.75||2|
|Min qty of soil specimen For test in g||1000||500||300||200||50|
% of Water Content = 100 x (W2-W3) / (W3- W1)
The water content % shall be expressed to two significant figures (e.g.- 2.3, 2.3, 0.23).
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