Akademik Veri Yönetim Sistemi
Tezin Türü: Yüksek Lisans
Tezin Yürütüldüğü Kurum: Erciyes Üniversitesi, Fen Bilimleri Enstitüsü, Türkiye
Tezin Onay Tarihi: 2022
Tezin Dili: İngilizce
Öğrenci: VERONICA GACAMBI KIUNA
Danışman: Zülküf Kaya
Özet:
The study is aimed at evaluating the effect of adding cement and sodium silicate to organic soil which has been considered as one of the most problematic soils by many researchers, especially when it comes to geotechnical engineering. Organic soil samples used in this study were obtained from Kayseri Free Area in Turkey. Geotechnical properties of organic soil are determined before and after the addition of the stabilizing materials Sodium silicate is added in compositions of 3% and 6% of the dry weight of soil while cement is used to replace the weak organic soil in 10% and 20% ratios. Consequently, four different samples were obtained from the mix ratios. Index properties and geotechnical properties of organic soil, which was identified as sample P, were determined and this formed the reference upon which strength improvements of each mix design sample were obtained. Optimum moisture content and maximum dry density of the soil and the various mixes were obtained using standard proctor test. UCS tests, California Bearing Ratio (CBR), and permeability tests were used to determine geotechnical properties. UCS tests were conducted on air cured samples for 1, 7, and 28 days. Soaked and unsoaked CBR samples were tested after 1, 7, and 28 days. From the experiments, sodium silicate and cement were seen to improve the strength of organic soil. CBR and UCS tests indicated that longer curing periods improved strength even more. Higher values were obtained for 7-day 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.