Akademik Veri Yönetim Sistemi
14th International Congress on Advances in Civil Engineering, İstanbul, Türkiye, 6 - 08 Eylül 2021, ss.413-420, (Tam Metin Bildiri)
Pozzolanic materials such as silica fume when added to soil possessing plastic nature alters the geotechnical properties in several aspects especially the expansive characteristics. In order to understand the primary phenomenon behind such diversifications, this research investigates the effect of micro-silica fume on the alluvial clay behaviour and the driving forces behind expansion behaviour. The pozzolanic material, micro-silica fume is added as a partial replacement by 5, 10, 15, 20, 25 and 30% by dry weight of the soil. The investigation of the treated soil’s behaviour includes consistency limits, cation exchange capacity (CEC), specific surface area (SSA), free swell index, electrochemical properties and soil water retention capacity of the soil matrix. The experimental outcomes indicate that the composition of silica fume highly influences the expansive characteristics of soil and causes a reduction in soil plasticity, CEC and the free swell index of the micro-silica fume treated soil. It is observed that silica fume effectively participates with alluvial clay in the range of 15 – 25 % and diverse characteristics are observed whereas beyond and below this range, no significant interaction is obtained.