SYMPOSIA PAPER Published: 01 January 1976
STP39084S

Shrinkage of Soil Specimens During Preparation for Porosimetry Tests

Source

Various methods of removing moisture from small soil samples were investigated. The samples were to be tested by mercury porosimetry, and one requirement is a constant volume drying process. Air-drying, oven-drying and freeze-drying procedures were used. Three different clay types were used: kaolinite, montmorillonite, and an illite. The clays were fully saturated, and compaction was achieved by using static pressure.

Freeze drying is the best practical method of drying the soil samples, as it produces the least amount of shrinkage in the soil. In certain instances, air drying and oven drying may produce satisfactory results. Total drying time for freeze drying can be accomplished in 5 to 10 h.

A simple laboratory freeze-drying system is described and operating procedures and principles discussed.

The results are applicable to the preparation of small size soil samples where it is desired to remove soil moisture and, at the same time, minimize disturbance to the soil structure.

Author Information

Zimmie, TF
Rensselaer Polytechnic Institute, Troy, N.Y.
Almaleh, LJ
Rensselaer Polytechnic Institute, Troy, N.Y.
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Details
Developed by Committee: D18
Pages: 202–215
DOI: 10.1520/STP39084S
ISBN-EB: 978-0-8031-5588-6
ISBN-13: 978-0-8031-0790-8