Abstract
Defined as land with water-saturated soil, formed from deposits that originate from the accumulation of decaying past plant. Peat soil has poor physical properties for construction purposes, the soil has low shear strength and has a high shrinkage because of a lack of mineral content in it. The research purposes were to find out the index properties and the classification of peat soil and to analyze the compression index (Cc) and the coefficient of consolidation (Cv) of peat soil. The research was carried out by gradual consolidation and immediately consolidation. In gradual consolidation the load was given in step by step of 0.5 Kg, 1 Kg, 2 Kg, 4 Kg, 8 Kg, and immediately consolidation using a load of 1 Kg and 4 Kg for 7 days. Peat soil of Pertahanan Village had high water content (w) of 726.34 %, specific gravity (Gs) of 1.302, moist unit weight (γb) of 0.764 gr/cm3, dry unit weight (γd) of 0.144 gr/cm3, void ratio (e) of 8.06. Based on ASTM D442-84 (1989), the peat soil had 45.032 % ash peat and 54.968 % organic content, and it was classified as High Ash Peat. The acidity of peat soil was 4 and it was classified as Highly Acidic Peat with a pH less than 4.5. Index compression (Cc) of the peat soil was 0.659 and the coefficient of consolidation (Cv) was 0.317 cm2/seconds.
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