ABSTRACT
IMPROVEMENT OF BEARING CAPACITY OF A SOFT SOIL
BY THE ADDITION OF FLY ASH
Ö / ZDEMIR, Murat Aziz
M.Sc., Department of Civil Engineering
Supervisor : Prof. Dr. Erdal Ç / OKÇ / A
Co-Supervisor : Assoc. Prof. Dr. Murat GÜ / LER
May 2011, 119 pages
Soft soils are not suitable for use in runway and highway
construction due to their undesirable characteristics such as poor
grading, low strength, excessive plasticity, tendency to shrink or
swell. By stabilizing such soils with appropriate agents, their
engineering properties can be improved. One of the stabilizing
agents is Class C fly ash.
This study aimed at investigation of bearing capacity
improvement of a soft soil (from Elmadag area) by using Class C
fly ash (from Soma Thermal Power Plant).
In the experimental study, index properties of soft soil and fly
ash stabilized samples are determined. Then modified Proctor
compaction, soaked California Bearing Ratio, and Unconfined
Compressive Strength characteristics of the samples are
investigated.
During the study, the stabilized soil samples are prepared at
different fly ash contents, i.e., 0%, 3%, 5%, 7%, and 10%. The
samples are subjected to soaked California Bearing Ratio tests
after 0, 7, and 28 days of curing. In addition to California
Bearing Ratio tests, Unconfined Compressive Strength tests with
0, 7, and 28 days of curing are performed samples. For
comparison purpose, hydrated lime is also used instead of fly ash
in Unconfined Compressive Strength tests at predetermined
contents, i.e., 3%, 5%, and 7%. In order to observe
microstructures of samples, Scanning Electron Microscope -
Energy Dispersive X-ray analysis are performed.
The results of the study show that bearing capacity of Elmadag
soft soil can be improved substantially and swell can be reduced
significantly by using Class C fly ash.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12613254/index.pdf |
| Date | 01 May 2011 |
| Creators | Ozdemir, Murat Aziz |
| Contributors | Cokca, Erdal |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
Page generated in 0.0017 seconds