DETERMINATION OF WATER CONTENT OF ROCK SAMPLE (IS-13030-1991)

Rock Core Sample
Rock Core Sample

Reference

IS-13030-1991- Method of test for laboratory determination of water content, porosity, density and related properties of rock material.

Objective

Determination of mass of water contained in a rock sample.

Apparatus used

Name of equipment Capacity Least count/Accuracy
Oven 105±30C 10C
Balance As per requirement 0.01% of the sample

 

Procedure

  • Clean the container and lid, dry it and determine the mass M1.
  • Place the rock sample in the container. Weigh the container with sample and record it as M2.
  • Remove the lid and place the container with the sample in the oven. Allow it to dry till it attains a constant mass.
  • After complete drying of sample, remove it from oven, replace the lids and allow it to cool in a desiccators for 30 minutes.
  • Weigh the oven dried sample with container and lid and record the weight as M3.

Calculation

Water content is calculated using the following formula.

Water content, w = (Pore water mass, Mw/Grain mass, Ms)*100

= ((M2-M3)/(M3-M1))*100

Where, M1 = Mass in ‘g’ of the container and lid

M2 = Mass in ‘g’ of the container + lid + sample

M3 = Mass in ‘g’ of the container + lid + oven dried sample

Report

Water content is reported to the nearest 0.1%.

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