جستجوی مقالات مرتبط با کلیدواژه "خصوصیات مکانیکی خاک" در نشریات گروه "کشاورزی"

Improving the mechanical properties of soil in order to build civil projects is one of the important concerns of civil engineers. For a long time, various methods have been recommended to improve the soil used in projects, and most of these methods have been the result of using past experiences, among which the use of different additives to the desired soil has been one of the most common methods. Today, by using high-tech laboratory equipment, it is possible to select additives needed to improve soil properties based on the type of minerals that make up that soil. Therefore, in the research, using scanning electron microscope and X-ray diffraction method, the type of constituent minerals and the morphology of the soils used in the channels of Azadegan Plain, which mainly had a chalky texture, were studied. The results of the research show that there are changes in the paste limit for all related samples, the lowest value for the sample with 5% lime is an increase of 7.65% and the highest value for the sample with 7% cement is an increase of 113.74%. The angle of internal friction for all samples shows, the lowest value related to the sample with 5% lime, 5% slag is equal to 22.2% and the highest value related to the sample with 5% cement is equal to 6.4% increase.

Some soils cause many problems to the road because of their undesirable mechanical properties. Several methods have been proposed for improving the mechanical properties of soil and in this study the ability of a polymeric was tested. As the soil of study area is fine-grained texture، with high clay content and plasticity، it''s necessary to improve the mechanical properties and stabilize the soil before road construction. Therefore، various laboratory tests including grain size distribution، Atterberg limits، soil compaction and California Bearing Ratio (CBR) were performed on control and treated samples. The results showed that the material decreased the liquid limit and plasticity index and increased the optimum moisture، maximum dry density and bearing capacity. However، the improvements in soil properties، especially increasing the bearing capacity، were not as high as claimed by producer company.