Strength and deformation characteristics of cement-treated clay | |
| Author | Hong, Law Kwai |
| Call Number | AIT Thesis no.GT-88-06 |
| Subject(s) | Clay--Testing Strength of materials |
| 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. GT-88-06 |
| Abstract | Series of UC, oedometer consolidation, and CIU triaxial compression tests were conducted to study the strength and deformation characteristics of cement - treated clay. Th e materials use d were Type I Portland cement and soft Bangkok clay taken from AIT campus. Cement powder was the only admixture used to mixed with the clay. The UC test results showed a rapid increase of the strength within the early 7 days and a decreasing rate of increase after 28 days, similar to the behavior of concrete. The strength increase was more than 20 times that of the untreated clay, after a one-month curing period (40 t/m2 for 10% cement content). The oedometer consolidation tests results showed that a cement content of 7 .5% and lower is not sufficient to improve the consolidation characteristics of clay . A cement content of 10% and higher improved the consolidation characteristics of the c l ay effectively, by increasing the cv a nd reducing the Cc . The apparent preconsolidation pressure of the treat e d clay increased with increasing cement content. Treated c l ay s h owed lightly over consolidated behavior in the CIU tests. The shear strength of the treated clay in creases with increasing cement contents and increasing confining pressures. Both c' and ¢' of the clay are increased by the cement treatment . Cement treatment does not improve the pore pressure response properties of the clay . · All the test results showed that a 10% cement content is enough to improve the strength and consolidation characteristics of soft Bangkok c lays. A comparison of the effectiveness of lime stabilization and cement stabilization was made and it showed that the early strengths of the lime-treat e d clays were as low as those of the 7. 5% content of the cement-treated clays, while the 7 - day strength of the 10% content of the cement- treated clays is as high as the 2-month strength of the 10% content of the lime-treated clays. Higher preconsolidation pressures , more brittleness , lower Cc, lower cv and higher shear strength parameters were observed in the cement-treated clays , as compared to those of the lime-treated clays. |
| Year | 1989 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GT-88-06 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Geotechnical and Transportation Engineering (GT) |
| Chairperson(s) | Balasubramaniam, A.S. |
| Examination Committee(s) | Noppadol Phien- wej ;Bergado, Dennes T. |
| Scholarship Donor(s) | DAAD, Federal Republic of Germany ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1989 |