TY - JOUR T1 - Effect of palygorskite and soluble salts on engineering characteristics of arid region soils TT - اثر رس‌های فیبری و املاح بر سرشتی‌های مهندسی خاک‌های نواحی خشک JF - ijcmir JO - ijcmir VL - 25 IS - 2 UR - http://ijcm.ir/article-1-794-en.html Y1 - 2017 SP - 341 EP - 352 KW - arid region soils KW - salinity KW - fibrous minerals KW - geotechnical properties N2 - In Iran, a large extent of the soils and water are facing with salinity; so the geotechnical properties of arid and saline soils are important for engineering design. In this study, the effects of salinity on geotechnical properties of fine-grained and coarse-grained soils containing fibrous clay minerals have been studied. The results showed that salinity was mostly a flocculated agent in fine-grained soils while in coarse-grained soils, it is usually a dispersing factor. In general, salinity increased dry strength parameters and decreased the optimum moisture content. But changes according to the type of clay mineral and particle size, distribution were different. M3 ER -