Effects of leaching on properties of artificially sedimented Rangsit clay | |
| Author | Woo, Siu-mun |
| Call Number | AIT Diss. no.D14 |
| Subject(s) | Soils Leaching Clay Sediments (Geology) |
| Note | A dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Engineering at the Asian Institute of Technology, Bangkok, Thailand |
| Publisher | Asian Institute of Technology |
| Abstract | Samples of artificially sediment Rangsit clay were prepared in salt solution (35 g/1 NaC1) and leached to referent degrees of salinity, i.e. 25 g/1, 10 g/1 and 7 g/1. Laboratory experiments were performed to study changes in soil properties due to leaching. Emphases were placed on the general in properties, swelling behavior, one-dimensional consolidation and undrained shear strength (CIU) characteristics. Results showed that leaching did not have any significant effects on the physical properties of the soils, such as plasticity and activity, The ion concentrations in both the free pore water and the adsorbed layers of the clay particles decreased. Leaching of salt from the soil pores was found to have two major effects, they are: increasing of the interparticle repulsion and weakening of the interparticle bondings. The magnitude of swelling increased with the degree of leaching. For the four leached soils studied, the general consolidation characteristics were quite similar. However, values of ovm, cv, k and the rate of excess pore pressure dissipation decreased. Due to the weakening of particle bonding and increasing of interparticle repulsion, both the undisturbed and remolded shear strength of the soils decreased about 20%, with a slight increase in the sensitivity (from 2 to 5). Leaching also lowered the development of excess pore pressure during shear, the magnitude of which was believed to be related to the structure of the leached soils. |
| Year | 1975 |
| Corresponding Series Added Entry | Asian Institute of Technology. Dissertation ; no. D14 |
| Type | Dissertation |
| School | AIT Publication (Year <=1978) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Dissertation (D) (Year <=1978) |
| Chairperson(s) | Moh, Za-Chieh |
| Degree | Thesis (Ph.D.) - Asian Institute of Technology, 1975 |