Engineering behavior of fly ash and its effectiveness in stabilizing dispersive soils | |
| Author | Kuganenthira, Nagamuthu |
| Call Number | AIT Thesis no. GT-89-07 |
| Subject(s) | Soil stabilization Fly ash |
| 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-89-07 |
| Abstract | This research program has been primarily concerned wit h two components: firstly, the study of the fundamental properties of fly ash in both fresh state and with time, and secondly, the influence of fly ash in the stabilization of a dispersive erodible soil. For both fly ash and stabilized soils, the laboratory investigations were concerned with the determination of compressive strength (triaxial and un confined strengths), cohesion and frictional parameters, rate of erosion (pinhole tests), compaction properties, consolidation characteristics and X- ray diffraction patterns. Specimens were compacted at natural and optimum moisture contents, and the variation in strength parameters of both fresh fly ash samples and cured samples were studied. The compatibility of the fly ash specimens was investigated by varying the moisture contents (i.e Standard Proctor). These results revealed t hat fly ash could be used as an effective construction material. It was attempted to quantify t he influence of varying quantities of fly ash on the behavior of stabilized soil. This study revealed t hat an increase in fly ash content promotes the strength properties of the stabilized soil. Optimum amount of fly ash content (5-8%) required to inhibit soil dispersity and erodibility was also determined by pinhole tests. The increase in strength properties was also found to be related to the curing time, where 90% of the compressive strength was attained after two weeks. This study has also revealed that use of fly ash increases the preconsolidation pressure of the soil, thereby enabling the soil to adopt an over consolidated behavior. |
| Year | 1990 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GT-89-07 |
| 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) | Indraratna, Buddhima |
| Examination Committee(s) | Rantucci, Giovanni ;Noppadol Phien-wej ;Bergado, Dennes T. |
| Scholarship Donor(s) | Royal Norwegian Government ; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1990 |