The growth trend of dynamic pore-water pressure was different from that of the isotropic consolidation test
when the initial shear stress exists.
The consolidation characteristics of industrial effluent contaminated soils were evaluated by performing one-dimensional consolidation test
on original, and contaminated soil specimens.
Secondary Consolidation Test
. When the primary consolidation is completed, the creep deformation of soft soil will continue with the prolonging of time, and the secondary consolidation effect cannot be ignored.
In order to determine consolidation characteristics of samples such as the time required for the end of primary consolidation and the over consolidation pressure, each sample were prepared according to following procedure before performing the consolidation test
. Before compacting each sample at the optimum water content they were kept in plastic bags for 24 hours.
Basic soil properties: The determination of index properties is an important criteria to consolidation test
. Various tests such as specific gravity (Gs), atterberg limits, sieve analysis and hydrometer for particle size distribution were performed on both undisturbed and disturbed samples for assessing the consolidation characteristics.
Vertical consolidation coefficient [c.sub.v], can be obtained from the consolidation test
, while horizontal consoledation coefficient [c.sub.h], is calculated using Barron equation , which had been simplified by Hansbo and Torstensson :
A much better consolidation test
would involve using the upper platen, instead of a preheated mass to apply the desired pressure.
A series of laboratory test was conducted including index testing, compaction test, UCS test, direct shear test, and consolidation test
on nontreated, as well as, ash-treated soils.
Simulating field drainage conditions at the laboratory consolidation test
may help to predict more accurate rate of consolidation.
Keywords: clay, consolidation test
, dilatancy, time effect.