نوع مقاله : پژوهشی
نویسندگان
گروه مهندسی عمران، دانشگاه بین المللی امام خمینی (ره)
چکیده
کلیدواژهها
عنوان مقاله [English]
نویسندگان [English]
Freeze-thaw and wet-dry cycles influence the geotechnical properties of soils, and it leads to the change of strength parameter of soil. During these processes that occur in the nature, one type of the soil with enormous damage-inflicting capability is sulfate clay soil; in these cycles, soil loses its strength swell.The sulfate clay soil cannot be stabilized by using Lime and totally by calcium
based stabilizer. Because the alumina of clay can react to the sulfate existing in soil and also calcium existing in lime, leads to producing an expansive mineral which is called Ettringite and is so expansive in the vicinity of water, causing many problems in the surface of road in the foundation of buildings.In the present study, in order to decrease the destructive effects natural process, sulfate clay soil is stabilized by CBR+4 ion exchange soluble. At first the CBR value of non - stabilized is measured and after that, this soil is subjected to freeze-thaw and wet-dry cycles, and the amount of its swelling and strength is measured.In the following research, the sulfate clay soil was stabilized by the ion exchange soluble $CBR^{+4}$ ; after that, the stabilized soil like the non- stabilized soil was firstly measured for the amount of its CBR strength and swelling of stabilized samples to be determined under freeze-thaw and wet-dry cycles.
کلیدواژهها [English]
)