Based on one-dimensional deformation tests of Nanning expansive soils, the relationship of deformation versus time was studied. The results indicate that swelling ratio is of a hyperbolic relationship with time in single-logarithmic scale and it could be divided into two stages: during a short time at the beginning, the swelling ratio increased dramatically; and after that, it trends to be stable. Using linear regression to analyze the relationship between swelling ratios and time, simple hyperbola functions to fit the swelling ratio curves can be easily obtained and the results are much agreeable. As for shrinking-time curve, it is almost linear with time in logarithmic scale. The simple linear functions to fit shrinking curves can also be obtained, which are much agreeable. Therefore, the paper provides a new simple way to analyze the relationship of expansive soils' deformation versus time. In practical engineering, those simple relationships could be used to predict the volumetrically changes with time.Copyright ASCE 2006.
|Title of host publication||Advances in Unsaturated Soil, Seepage, and Environmental Geotechnics - Proceedings of the GeoShanghai Conference|
|Number of pages||8|
|Publication status||Published - 18 Dec 2006|
|Event||Advances in Unsaturated Soil, Seepage, and Environmental Geotechnics - Shanghai, China|
Duration: 6 Jun 2006 → 8 Jun 2006
|Conference||Advances in Unsaturated Soil, Seepage, and Environmental Geotechnics|
|Period||6/06/06 → 8/06/06|