ABSTRACT
In the stress controlled method, the conventional oedometer is 1Jsed. The samples are placed in the consolidation ring trimmed to a height of 0.75 to 1 inch. The samples are subjected to a vertical pressure ranging from 500 psf to 2000 psf depending upon the expected field conditions. On the completion of consolidation, water is added to the sample. When the swelling of the sample has·ceased the vertical stress is increased in increments until it has been compressed to its original height. The stress required to compress the sample to its original height is commonly termed the zero volume change swelling pressure. A typical consolidation curve is shown in Fig 18.17.
