I am performing a variety of test for a sample of soil and was hoping someone could tell me how to calculate percent volume change in soil based on shrink and swell results...
Go back to basic weight-volume relationships of soil. For shrink/swell tests, the volume is usually constrained in the lateral and one vertical direction (the bottom of the sample). Therefore, the results will be linear, not volumetric.
does this relate to calculating earthwork quantities or the shrink-swell performance of subgrades for foundations, etc.? What "variety of tests" have you performed?