چكيده به لاتين
The rapid and growing progress of human societies has led to problems such as increased volumes of waste and lack of space to repel them. Including these materials are waste tires which in addition to occupying a large area of the world, can cause dangers such as fires, pollution of underground water, and the spread of raptors and diseases. The increasing production of worn-out tires of high durability and the lack of a rigorous solution for recycling or optimal use is one of the problems that have arisen in recent years. Mechanical properties (high tensile strength, low specific gravity), durability and non-deterioration, and the insignificant price of these tires make the use of these tires in soil structures such as slopes, retaining walls, pavements and foundations to improve soil behavioral parameters. Therefore, due to the need to dispose of these materials in the soil, it is necessary to find practical solutions for re-use of tire in geotechnical problems. Therefore, in the present study, to increase the shear strength parameters of the soil, as well as the effect of adding the tire chips on the force-displacement curve by adding the tire chips with volumetric percentages of 20, 25, 30, 35 and 40 percent to Firoozkooh sand and taking into account the density A relative fraction of 70 percent was performed for all the blends. In this research, the behavior of mixtures in stresses of 50, 100 and 150 kPa has been investigated. Also, for determining the characteristics of aggregate materials, grading experiments, determining the specific grains (G_S), and determining the specific gravity of the minimum and maximum of all the mixtures were performed. The results show that adding 30 percent of tire chips to sand can improve the resistance strength of the mixture.
Keywords: tire chips, sand, direct cutting test, shear strength, environment
