Investigation of the effect of Sizes Crumbed of worn Tires in shear strength parameters of Sandy soil

Document Type : Research Article

Authors

Civil Engineering Department, Tafresh University, Tafresh, Iran

Abstract

Due to the spread of the automotive industry worn tires are being consider as one of Environmental pollutants in recent decades because of the lack of decomposition in nature. The use crumbed tires with mixed soil is provided as one of the solutions to prevent environmental hazards caused by tire burial. According to the tires properties, such as elastic behavior, low water absorption, and the appropriate cost to use it in the form of crushed, they can be used in arming and improving the properties of earth materials. In this article, the optimal percentage of crumbed tires in the sand to increase its shear strength parameters as well as the effects of adding crumbed tires on the Displacement-load curve by using a large-scale direct shear test (box 30x30 cm) has been studied. For this purpose, sand with percentages 5%,10%,15%,20% and25% of crumbed tires with dimensions of 2x2 and 2x4 under normal stress of 30,60 and 120 Kpa have been tested in direct shear test and amount of percentages and dimensions of optimal crumbed tires which the shear strength is maximum for it determined. Since the shear strength of soils is because of the angle of internal friction and viscosity, the effect of crumbed tires on each of these parameters is studied. The results show that the optimum condition is the sample with 15% of 2x4 crumbed tires that increase the angle of internal friction up to 27%. also adding crumbed tire cause to increase the capacity of sand plasticity.

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References

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Amirkabir Journal of Civil Engineering
Volume 55, Issue 4
July 2023
Pages 893-910

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