Effects of cement and lime addition to soft clays on their strength in saturated condition of Mahshahr Port
- سال انتشار: 1392
- محل انتشار: دوفصلنامه زمین شناسی ژئوتکنیک، دوره: 9، شماره: 4
- کد COI اختصاصی: JR_JGEO-9-4_007
- زبان مقاله: انگلیسی
- تعداد مشاهده: 375
نویسندگان
Department of Engineering Geology, Tarbiat Modares University, Tehran, Iran
Faculty of Basic Sciences,Tarbiat Modarres University, Tehran, Iran
Department of Engineering Geology, Tarbiat Modares University, Tehran, Iran
چکیده
The surface sediments in Mahshahr Port area are mainly consist of soft clayey soils. These soils have considerable strength in dray condition but as their moisture content moves up to saturated level a notable decrease in their strength is observed. This reduction, in turn, leads to decrease of California Bearing Ratio (CBR) and increase in soil settlement which consequently results in vast and destructive deformation in the surrounding buildings. In this research, the addition of cement and lime to the soil is considered to evaluate their effect of the soil strength by performing unconfined compressive (UCS) and Atterberg Limits tests. In this procedure, different ratios of lime and cement mixture (۰.۰ %, ۲ %, ۴ %, ۶ %, ۸ %, ۱۰ %, and ۱۵ %) with various curing times is considered. The results of these tests revealed that compressive strength of soft clay decreases by adding lime or cement due to disturbing its initial structure. This decrease of strength is induced by high sensitivity of the soil, however as the time passes compressive strength of the cement-added samples rapidly grows; as compressive strength in modified samples with ۶ % cement and curing time of above ۳ days has increased compared to undisturbed samples and their plasticity index has decreased. On the other hand, compressive strength of samples modified by lime gradually increased, as adding ۶ % lime to the soil and applying curing time of ۲۸ days did not lead to increase of their compressive strength compared to undisturbed soil samples and their plasticity index decreased.کلیدواژه ها
Soft clayey soil, Cement, lime, unconfined compressive test (UCS), Atterberg limitsاطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.