| Author | Siu, Kong-lam |
| Call Number | AIT Thesis no. 327 |
| Subject(s) | Soil structure
Soil mechanics
|
| Note | A thesis submitted in partial fulfillment of the requirements
for the Degree of Master of Engineering at the Asian Institute of Technology, Bangkok, Thailand |
| Publisher | Asian Institute of Technology |
| Abstract | An experimental investigation was carried out to study
the effect of soil structure on dilatation of clay during
shear. Samples of soft Bangkok clay were sedimented in the
laboratory. Flocculated and dispersed soil structures were
produced by sedimentation in solutions of sodium chloride and
sodium hexametaphosphate respectively. In addition, the
flocculated samples were leached with distilled water to
achieve various final salt concentrations. Triaxial consolidated undrained tests with pore pressure measurement were employed to study the tendency of soil to dilate during shear. The test results showed that at any particular value of
overconsolidation ratio the flocculated soil exhibited a greater tendency to dilate during shear than the dispersed soil did,
In the flocculated soil, the tendency to dilate decreased
with an increasing amount of leaching and the unleached flocculated soil exhibited the greatest tendency to dilate. When the OCR was equal to 24 and 1, the tendency for dilatation was nearly the same for all soils. Bjerrum’s concept of diagenetic bonds and recoverable strain energy was found satisfactory to explain the observed results. Based on that concept, a mechanism of dilatation in overconsolidated soils was proposed. |
| Year | 1970 |
| Type | Thesis |
| School | Student Research Before 1980 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Chairperson(s) | Nelson, John D. |
| Examination Committee(s) | Moh, Za-Chieh ;Brand, E.W. |
| Scholarship Donor(s) | Asian Institute of Technology |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 1970 |
