Dynamic characteristics of a sandy subgrade reinforced by waste tire textile fibres

ABSTRACT

In the current research, effort has been made to gain a deeper understanding regarding the parameters affecting the dynamic behaviour of a sandy soil reinforced by Waste Tire Textile Fibres (WTTFs) that are produced during the recycling process of the End of Life Tires (ELTs). Such parameters as loading duration, rest time, and aspect ratio of fibres have been investigated by cyclic triaxial tests considering 3 different confining pressures and 21 different Cyclic Stress Ratio (CSR) levels. It is concluded that the aspect ratio of the fibres is a more prominent parameter than loading state and fibres with an optimum aspect ratio of 37.5 can improve the dynamic characteristics of the soil reinforced by WTTFs. Generally, the influences of fibre aspect ratio and loading characteristics on resilient modulus, damping ratio and phase angle of the reinforced specimens are diminished as CSR increases, while the permanent strain and energy absorption capability are directly related to the CSR.

KEYWORDS:

• Waste tire textile fibres
• soil reinforcement
• loading characteristics
• fibre aspect ratio
• dynamic properties

Disclosure statement

No potential conflict of interest was reported by the author(s).