The Characteristics of treated Matang fibrous peat in drained and undrained triaxial compression tests
peat soil is well known as problematic soil due to their high water content, high compressibility and low shear strength. The chosen study area is Matang, Kuching, Sarawak, an upcoming development in the state with mushrooming housing estates and commercial centers. Studies have been carried out...
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| 格式: | Thesis |
| 语言: | English |
| 出版: |
2012
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| 主题: | |
| 在线阅读: | http://ir.unimas.my/id/eprint/14280/1/Jacqueline.pdf |
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| 总结: | peat soil is well known as problematic soil due to their high water content, high
compressibility and low shear strength. The chosen study area is Matang, Kuching, Sarawak,
an upcoming development in the state with mushrooming housing estates and commercial
centers. Studies have been carried out on preliminary tests on the untreated peat and strength
evaluation of stabilized tropical fibrous peat samples The stabilizing agent used was Ordinary
Portland Cement (OPC) due to its high strength and availability. Remolded cemented peat
samples were prepared with cement content of 10%, 25% and 50% by weight of dry soil and
cured for 7, 14, 28 and 90 days. These stabilized samples were tested for their strength
through unconfin$j1 compression (UC), unconsolidated undrained (UU), isotropic
consolidated undrained (CIU) and isotropic consolidated drained (CID) triaxial compression
tests. From these tests, it was found that as the addition of cement to soil and curing period
increased, soil's stiffness and strength increased in the UC, UU and CID tests but to a certain
limit in the CIU tests. It was also found that the UU test results were found to be linearly
proportional to UC tests with R-square of above 0.974. The friction angle of cement stabilized
peat samples was higher than untreated peat but the observed trend was not meaningful for
longer curing time and higher cement content due to the small changes. CD test results are
more reliable in comparison to CU test because it idealizes the soil behavior in the real
condition, but this test takes longer period to perfonn. Thus, a reduction factor for the
effective friction angle of cement stabilized peat that was obtained in CIU and CID tests was
in the range of 0.81 to 0.97. The strength behavior of the cement stabilized peat is affected by
cement content, curing time, moisture content and confining pressure. |
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