As the number of cars increase, disposal of waste tires increases remarkably year by year. However the treatment methods such as reclamation and incineration have environmental and social problems and the recycling is limited due to the economical res...
As the number of cars increase, disposal of waste tires increases remarkably year by year. However the treatment methods such as reclamation and incineration have environmental and social problems and the recycling is limited due to the economical restraint. Comparatively, the methods of using waste tires in civil engineering project such as cell-type tire(called ‘Tirecell’) and mat-type tire(called ‘Treadmat’) for soil reinforcement (Yoon et al., 2004) seem effective because large amounts of disposal of waste tires for soil reinforcement are possible. In this research, large direct shear tests for soil-tread and tensile tests using Universal Testing Machine for various conditions of connection joint between waste tires were performed to know mechanical properties as soil reinforcement material.
From the large direct shear tests, the ratio of interface friction angle to the shear friction angle of sand, δ/φ, were 1.06 in outside surface of tire tread and 0.93 in inside surface of tire tread. For weathered granite soil the ratio of interface friction angle was 0.98 and 0.92 for outside and inside of tread, respectively. Also tensile tests were performed using universal testing machine for the connection joint of treads and Tirecell units using bolts. The tensile strength of connection joint increased with the number of bolts and with the sizes of washers. Connection by polypropylene ropes showed lower strength than those of bolts.