چکیده مقاله
In recent years, growing environmental concerns about ecosystem pollution and global warming have spurred considerable efforts to reduce the use and production of environmentally unfriendly materials In this regard, biological or bio inspired approaches, such as enzyme induced calcium carbonate precipitation EICP , have recently become eco friendly techniques in geotechnical engineering for soil improvement This technique uses a mixed solution composed of urea, calcium chloride, and the urease enzyme as the soil grouting material, producing calcite CaCO3 as a binder In this study, to reduce costs, the urease enzyme extracted from soybean seeds was used in the EICP method to improve the mechanical behavior of Firoozkuh No 161 sand The macro and micro scale behavior of EICP treated specimens with varying parameters such as molarity of cementation solution, relative density of sand, number of treatment cycles, and the amount and activity of urease enzyme have been investigated using the unconfined compression strength UCS test and scanning electron microscopy SEM The results showed that the precipitated calcium carbonate improved soil strength and stiffness by filling the voids, roughening the grain surfaces, and bonding the particles Finally, this non destructive approach is proposed as a sustainable soil improvement alternative to environmentally harmful materials
کلیدواژهها
نویسندگان
Elham Mousavi Sarbangholi
Ph D student, Department of Civil Engineering, University of Tabriz, Tabriz, Iran
مسعود حاجی علیلو
Professor, Department of Civil Engineering, University of Tabriz, Tabriz, Iran
شیوه ارجاع
Mousavi Sarbangholi, Elham and Hajialilue-bonab, Masoud,1404,Macro-micro experimental investigation on the behavior of EICP-treated sands,14th International Congress on Civil Engineering,Tehran
ارائهشده در
مجموعه مقالات چهاردهمین کنگره بین المللی مهندسی عمران29 مهر 1404 · تهران