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Part 3. Behavior of Overconsolidated Clay. Normal versus Overconsolidated clay behavior. Clay retains a “memory” of its load history The effective cohesion of overconsolidated clay can be significant

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part 3
Part 3

Behavior of Overconsolidated Clay

normal versus overconsolidated clay behavior
Normal versus Overconsolidated clay behavior
  • Clay retains a “memory” of its load history
  • The effective cohesion of overconsolidated clay can be significant
  • The effective cohesion can be lost through subsequent wetting, especially, load cycling with moisture
slide3
Mohr Circle plot of a typical overconsolidated clay soil, illustrating the artificially high cohesion engendered by tortuous desiccation. Note the apparent preconsolidation pressure caused by the severe shrinkage.
slide4
The fundamental problem with slabs-on-grade on expansive soils is differential swell beneath the corners, sides, and under the center of a uniformly-loaded slab, as sketched here.
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