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• Immersed apparent mass: For each specimen, suspend the specimen by a wire to immerse it in water and determine the immersed apparent mass of the specimen after conditioning. This mass must not include the wire or other materials.
• Saturated mass: Remove the samples from the water. Surface-dry the specimens by wiping with a towel on all faces and determine the mass.
• Place six samples on the grid in the MgNO3 box and six others on the grid in the NaCl box.
• Directly remove the samples from the box and record the mass of each sample, along with the time and relative humidities at specified intervals as outlined in 8.5.
• Weighing times:
• Week 1 – once a day
• Week 2 – twice a week (beginning and end of the week)
• Week 3 to week 25 – once a week.
• When equilibrium is reached, oven-dry the samples and record the mass (see Oven-Dry Mass, ASTM C642).
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