Mechanical behavior of sand-tire chips mixture under monotonic loading

Abstract

The volume of used tire in the world is increasing tremendously every year due to the increase in population. With the increasing volume of used tire, it causes environmental and financial burden towards many regions all around the world. This volume of used tire will occupy landfills and may cause fire or provide breeding ground for mosquitos. Therefore used tire had been implemented into geotechnical engineering to create a sustainable future. In order to implement used tire in geotechnical engineering application a full understanding of the mechanical properties of used tire is required. This study aims to investigate the mechanical behavior of sand-tire chips mixture with 30% and 50% tire chips content under monotonic loading using triaxial test at confining pressure of 100, 200 and 300kPa. As the percentage of tire chips increased the cohesion tends to increase but decrease the friction angle. The shear strength of sand-tire chips mixture increased with the addition of tire chips are added into sand until a vicinity percentage of 30% and beyond that it tend to decrease. This is due to the addition of tire chips tend to behave more as a mass with sand inclusions rather than a reinforced soil. Besides that when the sizes of tire chip increased the shear strength tend to increase. Principally this is due to the friction between the sand and tire chips are reduced. When tire chips content increased elastic modulus has a tendency to decrease as a result of tire chip is an effective energy absorbent material. It is also observed that as the when confining pressure increase, the elastic modulus tends to increase.The volume of used tire in the world is increasing tremendously every year due to the increase in population. With the increasing volume of used tire, it causes environmental and financial burden towards many regions all around the world. This volume of used tire will occupy landfills and may cause fire or provide breeding ground for mosquitos. Therefore used tire had been implemented into geotechnical engineering to create a sustainable future. In order to implement used tire in geotechnical engineering application a full understanding of the mechanical properties of used tire is required. This study aims to investigate the mechanical behavior of sand-tire chips mixture with 30% and 50% tire chips content under monotonic loading using triaxial test at confining pressure of 100, 200 and 300kPa. As the percentage of tire chips increased the cohesion tends to increase but decrease the friction angle. The shear strength of sand-tire chips mixture increased with the addition of tire chips are added into sand until a vicinity percentage of 30% and beyond that it tend to decrease. This is due to the addition of tire chips tend to behave more as a mass with sand inclusions rather than a reinforced soil. Besides that when the sizes of tire chip increased the shear strength tend to increase. Principally this is due to the friction between the sand and tire chips are reduced. When tire chips content increased elastic modulus has a tendency to decrease as a result of tire chip is an effective energy absorbent material. It is also observed that as the when confining pressure increase, the elastic modulus tends to increase. Description