Akademik Veri Yönetim Sistemi
7th International Mediterranean Science and Engineering Congress (IMSEC 2022), Antalya, Türkiye, 24 - 26 Ekim 2022, sa.2, ss.9-13
The study was aimed at determining how addition of cement and sodium silicate to organic soil influenced its
unconfined compressive strength. Cement and sodium silicate were used as the additive stabilizing agents to treat organic
soil which is one of the most problematic soils when it comes to geotechnical engineering. Organic soil samples upon
which stabilization was conducted were obtained from Kayseri Free Area, Turkey. Index properties of organic soil were
first determined to help understand the nature of the soil sample. Tests to determine the engineering properties of the soil
were conducted before and after addition of the stabilizing materials. Cement was used to replace soil in percentages of
10% and 20% while sodium silicate was added in compositions of 3% and 6%. The stabilizing materials, cement and sodium
silicate, were added in proportions of percentages of the dry weight of the organic soil. From the different compositions,
four samples were obtained upon which the effect of cement and sodium silicate on unconfined compressive strength of
the organic soil was determined. Standard proctor test was used to help obtain the maximum dry density and the optimum
moisture content of the untreated sample and the treated samples. Unconfined Compressive Strength (UCS) tests were
performed to determine the extent to which the UCS of the soil increased as the stabilizing materials were added. UCS tests
were conducted on air cured samples for 1, 7, and 28 days.From the UCS tests conducted, sodium silicate and cement were
seen to improve the strength of organic soil. The tests also depicted that longer curing periods improved strength even more.
Higher values were obtained for 7 days cured samples than for 1 day samples with the highest values being obtained for 28
days cured samples. Design mixes with higher cement and sodium silicate compositions gave the highest values of strength.
In conclusion, sodium silicate and cement give positive results when it comes to stabilizing organic soil.