Density and permeability properties of over compacted sands and laterites
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Date
2018-06
Authors
Chun Hua, Ng
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Abstract
Proper soil compaction is essential in any type of construction project. It is very
important because it provides the necessary platform that will sustain the crucial support
for the buildings, various construction foundations, landfills, and any other construction
structures. Therefore, soil compaction have to be applied sufficiently and practically with
the concern to the aspect of the desired soil parameters, yet taking consideration to the
time and cost of the entire compaction process. This dissertation presents the relationship
between the 3 major parameters, which are the dry density gained, the permeability
coefficient reduced and the compaction energy applied to the soil. Laterite soil and river
sand are the two of the most abundant soil materials present in construction field were
chosen as the soil sample for this research study. The soil samples have undergone
permeability and proctor compaction tests with different level of compaction energy to
acquire sufficient data for the analysis and interpretation of the relationship between the
3 major parameters. Proctor compaction tests were conducted at first as the results of the
data are required to use as the constant variables in the permeability test later. The results
show that the laterite soil have greater sensitive to the change of compaction energy in
term of the dry density and permeability coefficient that are affected. Besides that, laterite
soil shows properties with higher maximum dry density and lower permeability
coefficient obtained from the same compaction energy with the river sand. However,
although the laterite soil show lower permeability coefficient as compared to the river
sand, both of the soil samples are still far beyond from the impervious permeability
properties that are required for landfill purpose. The optimum compaction energy for dry
density and permeability purpose are different and it varies with type of soil sample. Last
but not least, the findings from this research provides useful information for the engineer
to estimate the suitable compaction energy that are required for their construction project.