Cornerstone Earth Group, Inc. in-house laboratory manager has over 30 years of experience in soil testing and classification. Cornerstone’s laboratory testing includes compaction curves, grain size distribution, plasticity index, relative moisture, relative strength, consolidation and lime stability.
Change in soil colors with depth is one indication of change in origination, soil type, fines content (silt and clay), and plasticity. Laboratory testing aids in classifying soils obtained from the site explorations and evaluating their geotechnical engineering parameters.
Q: What can you tell from the picture below?
A: Fill to 2 feet; high plasticity to 6 feet; possible liquefaction at 13 feet.