Abstract:
The study aims to investigate the consolidation property of sediment resulted from the process of
Bangken water plant and released so much in terms of quantity. The investigation concerns physical
properties and fundamental engineering properties, including Atterberg limit, specific gravity, grain
size analysis and soils classification. The dried soil sediment through sieve no.4 is initially tested to
determine the density, moisture content, CBR, unconfined compression test and direct shear test are
carried out. Moreover, the consolidation is focused particularly on the water content at 30, 40,50,
and 60 percent
The result of investigating physical properties and fundamental engineering properties reveals til at
the soil sediment has light brown color and the liquid limit is equal to 77.96 %. The plastic limit
(PL) presents 50.76% and shrinkage limit is of 11.l5%. The specific gravity (Gs) yields 2.65 and
plasticity index is 27.20%. In accordance with AASHTO classification standard, it found that the
soil is classified in A-7-5 type and MH type (sandy elastic silt) with USC standard. The maximum
density is of 1.33 glcm3 and the optimal moisture content is 29%. Additionally, the CBR at 95% by
average equal to 8.73% and compressing resistance strength of the soil sample is within 5-12 kglcm2
and friction angle is 39 and cohesion (c) is 0.40 ksc. The result of One-Dimension
Consolidation test at moisture content 60 percent have maximum consolidation at moisture content
40 percent have maximum of compression index and at moisture content 50 percent have
maximum of swell index. This is because the moisture content increte waste water sludge have high
of consolidation because void ratio increte