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Moisture Content

Test Methods

ASTM Designation: D 2216, “Standard Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass”

AASHTO Designation: T 265, “Standard Method of Test for Laboratory Determination of Moisture Content of Soils”

Summary of Test Method

A test specimen is dried in an oven at a temperature of 110 +/- 5°C to a constant mass. The loss of mass due to drying is considered to be water. The water content is calculated using the mass of water and the mass of the dry specimen.

For many materials, the water content is one of the most significant index properties used in establishing a correlation between soil behavior and its index properties. The water content of a material is used in expressing the phase relationships of air, water, and solids in a given volume of material.

Minimum Sample Size

0.5 lb

Last Updated September 29, 2005

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