ENGINEERING PROPERTIES OF PEAT IN OGAN ILIR REGENCY
DOI:
https://doi.org/10.11113/jt.v78.9485Keywords:
fibrous peat, shear strength, consolidation, permeabilityAbstract
Seventeen percentages of Sumatra is covered with peat deposits. Some 1.6 million Ha is deposited in the East coast of South Sumatra. More over, 63.503 Ha is found in Ogan Ilir Regency. Laboratory soil tests are performed to determine the engineering properties of the peat. Generally the tests use undisturbed samples obtained with a block sampling from sites in Ogan Ilir Regency, but the physical tests for specific gravity, water content, and ignition loss occasionally employ disturbed samples. The tests for the determination of the engineering characteristics involve shear strength, consolidation, and permeability tests. The test results show that the peat soil in Ogan Ilir can be classified as fibrous peat with degree of decomposition (H4–H5 in von Post scale) and fiber content > 20 %. The average natural moisture content of the peat is 441,933 %. The average results of direct shear test showed the effective cohesion (c’) and the effective angle of internal friction (ï¦â€™) are 7.62 kPa and 19.930. The average coefficient of rate of consolidation (cv) obtained from Oedometer test ranged from 3.20 from 0.93 for pressure range of 25 to 400 kPa. In general, the results show similar values with the reference data of other peat soils.References
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