TY - JOUR ID - 4583 TI - Investigation into the short-term behavior of silty sand stabilized with colloidal silica JO - Scientia Iranica JA - SCI LA - en SN - 1026-3098 AU - Noorzad, R. AU - Nouri Delavar, I. AD - Department of Civil Engineering, Babol Noshirvani University of Technology, Babol, IRAN Y1 - 2019 PY - 2019 VL - 26 IS - 3 SP - 1206 EP - 1213 KW - Soil stabilization KW - Colloidal silica KW - Silty sand KW - Short-term behaviour KW - Strength parameters DO - 10.24200/sci.2017.4583 N2 - Injection in soils using traditional materials, such as cement grout, has its inherent problems and has not shown the potential for further development in industrial applications. Accordingly, application of novel materials for injection in soils with considerable content of fines for stabilizing and even making them impermeable is suggested. Among different stabilizers that are injectable in soils with fine, colloidal silica seems very suitable due to its very low viscosity, nontoxicity in the nature, and adjustability of the setting time for slow injection in soils with fine. Based on laboratory tests performed in this research, the effect of colloidal silica on the strength parameters and the short-term behaviour of silty sand was examined. For characterizing the soil stabilized by colloidal silica, the silty sand samples with different silt values, in both unstabilized and stabilized conditions, were prepared with different concentrations of the stabilizer. 45 Uniaxial tests and 75 unconsolidated- undrained compressional triaxial tests were conducted. An increase in the undrained cohesion of all samples was observed. On the other hand, two different trends were observed in the alteration of the undrained internal friction angle of soils with low and high fines content. UR - https://scientiairanica.sharif.edu/article_4583.html L1 - https://scientiairanica.sharif.edu/article_4583_4d5c555e38bf824f90b090416ab9b3ab.pdf ER -