نوع مقاله : مقاله پژوهشی
نویسندگان
گروه مهندسی عمران، دانشکده فنی و مهندسی، دانشگاه قم، قم، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Expansive soils are considered among problematic soil groups and the predication of the expansion rate of these soils is important. In the present study, three types of different clay soils with different specifications have been randomly selected from three different areas of some countries. Samples pertaining the first series have been selected from Indonesia, in which montmorillonite is the mixed soil of most of constituent minerals and enjoys an extremely high expansion potential (between 70 to 122%). Samples of the second series have been taken from northern Oman. The montmorillonite soil has a very high plastic property. The percentage of montmorillonite mineral presented in this soil is higher than that of the other clay minerals.. Samples of the third soil of this study are the result of a research achieved on compacted soils in which the samples have mainly consist of a combination of silica sand, kaolinite and bentonite with different mineral percentages. In the present study, the soils that have been used fall within the category of fine-grained soils as per the Unified Soil Categorization System. The regression analysis was used by means of Design-Expert software for different values of plastic properties in order to estimate the expansibility of the soils with high plastic properties. Comparing the relationship obtained in this study and that of Seed et al., the correlation coefficient in this study is higher; and lower RMSE and MAE have been obtained here. This suggests the high and proper precision of the relationship.
کلیدواژهها [English]
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