چكيده لاتين
Nowadays, soil improvement is an important part of geotechnical projects. Among the soil improvement methods, different additives such as cement, lime, nanomaterials, industrial waste, etc can be pointed out. In the current research, it has been tried to use nanomaterials, steel slag and their combination to improve 4 soil samples of Isfahan city (S1, S2, S3 and S4). In fact, in this research, the engineering properties of soils were determined at first by conducting tests on grain size distribution, the specific gravity of solid particles, Atterberg limits, standard compaction, California bearing ratio, uniaxial compressive strength and direct shear. Then in order to improve the soils in the first part, nanomaterials (nanoalumina, nanomagnesia, nanosilica and nanoclay) were independently added to the studied soils at an optimum of 1%. In the second part, steel slag in different percentages (5, 10 and 15%) was added independently to the studied soils , and in the third part, nanomaterials were added together with steel slag in their optimal percentage to the studied soils. In general, in each section, the impact of additives on improving the technical characteristics of soils was measured by performing tests on the Atterberg limit, uniaxial compressive strength and direct shear. The results of the experiments show that the optimal amount of steel slag in improving the soil of Isfahan city is 5% by weight. Finally, by comparing the effect of additives (nanomaterials, steel slag and combined state) on compressive strength and modulus of elasticity of the studied soils, it was found that improvement with steel slag has a more favorable effect from a technical, economic and environmental point of view, and steel slag can be a good substitute for nanomaterials.
