Compression and Consolidation on Compressed Dehydarated Sludge

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Compressive properties on compressed sledged sludge called 'Dehydrated Cake was intended to clarify.Dehydrated Cake which made in Kojima Artificial Lake in Okayama prefecture is used as embankment materials by Ministry Agriculture, Forest and Fishery. Since the geotechnical property of Dehydrated Cake are not known, the model test such as centrifuge test, model soil bin test and large scale ouedmeter test. Miniature dehydrated cake were made by sieving and by compressed several pressure by large scale onedmeter . The following conclusions are made : (1) Settlement of Compressed sample is the larger with its diameter larger. (2)The larger water content of sample is the settlement the less.(3)Settlement of dehydrated cake become a certain value within 20 days in any test.(4)Settlement of dehydrated cake in water were lager than one in air. (5)The deference of water content of dehydrated cake were not significant in water contrary to in air.(6)The settlement of the sample compressed the high pressure were smaller than one with low pressure. (7) Size of dehydrated cake is the lager the settlement and the compressive coefficient were lager. (8)Numerical analysis show fairy to predict the future behavior using the data experimented.