Sewage treatment plants produce large
quantities of sewage sludge as by-products, as the sludge
contains elements harmful to environment. Such study
investigated of utilizing different percentages of sewage
(7, 14 and 21%) of soil weight. The stabilization /
solidification process was used to improve the
properties of the organic soil and meet its requirements.
This technique was the use of traditional and nontraditional additives such as cement and styrene acrylic.
The major objective of that research is to evaluate
efficiency of stabilized soils through comparison of
stabilizers. The organic soil was prepared and
stabilizers were added in different proportions (3, 6 and
9%) for the purpose of the tests. Mechanical tests
(Unconfined Compressive Strength (UCS) and
Hardness) were used for the soil sample to estimate the
best mixing and obtaining higher strength. Through
outcome of the UCS and hardness tests, cement was
most effective agent of styrene in terms of improving the
properties, strength and hardness of the organic treated
Keywords : Sewage Sludge, Soil, Stabilzation/Soldification, Stabilizers, unconfined compressive strength.