Anisotropic consolidation of cement-treated clay at higher water content | |
| Author | Chalermpol Taechakumthorn |
| Call Number | AIT Thesis no.GE-03-14 |
| Subject(s) | Anisotropy Clay Soil consolidation Soil stabilization |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GE-03-14 |
| Abstract | In the construction process of deep mixing pile, the cement-admixed clay is subjected to high mixing water content condition. The behavior of cement-treated soft Bangkok clay at high mixing water content such as unconfined compressive strength, one-dimensional consolidation in oedometer and consolidated-undrained compression test in triaxial condition have been studied previously but not in stress-deformation behavior in drained condition. In this study the effect of high mixing water content and cement content on the stress-deformation behavior under triaxial compression loading in drained condition of cement-treated soft Bangkok clay were investigated using the anisotropic consolidation test at stress ratio (ri) of 0.00, 0.25, 0.50, 0.75, 1.00 and 2.00. The cement contents were used namely 10% and 15%, and each cement content was in combination with 100% and 130% total clay water contents. The water-cement ratio of the cement slmTy is 0.60. The volumetric strain and the shear strain behavior were affected by cement content and total clay water content. The cement-treated clay specimens with lower cement content and higher total clay water content have higher both volumetric and shear strains at same stress ratio. Relationships of volumetric strain (Ev) to shear strain (Es) showed bi-linear characteristics corresponding to before yielding and after yielding condition, and the slopes of both conditions were affected by cement content and total clay water content. The strain increment ratio ( dEvldEs) demonstrated two distinct relationships, before and after transition points. It was found that the higher cement content and the lower total clay water content, the greater values of strain increment ratio ( dEvldE5) were obtained both before and after transitional yield points. The plot of all yield loci demonstrated that yield loci are affected by cement content and total clay water content. The strain increment ratio relationship and the yield locus were normalized using the strain increment ratio at stress ratio (ri) equal to 0.00 and yield mean effective stress at stress ratio (ri) equal to 0.00, respectively. Finally, empirical equations for normalized strain increment ratio relationship and normalized yield locus, which are useful for stressdeformation analysis of cement treated soft Bangkok clay, were presented. |
| Year | 2003 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GE-03-14 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Geotechnical Engineering (GE) |
| Chairperson(s) | Bergado, Dennes T.; |
| Examination Committee(s) | Noppadol Phien-Wej; Park, Kyung-Ho ; |
| Scholarship Donor(s) | Royal Thai Government; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 2004 |