According to the Swiss standard VSS 70 321 (2025) (similar SN 670 321a from 2001)
Specimen is soil with a maximum aggregate size of 16mm. There are two cooling plates on top and the bottom size of the specimen. With a high precision LVDT the height c
hange of the specimen during freezing and thawing is measured. The test comines two test methods: The height change test and the strength weakening during the thawing process. The test is easy to handle and is finished in 5 days. The specimen has an optimal water content, determined by the Proctor test.
