Track: Sustainability and Green System

Abstract

A significant portion of discarded rubber is originated from the automobile and truck industry. It is a major concern as discarded tyres are non-biodegradable and undesirably influence the ecosystem. The available treatment methods, such as landfilling, stockpiling, and burning, are not feasible due to environmental and economic issues. Discarding vehicle tires in landfills generates toxic leachate including lead, cadmium, aluminium, mercury, iron, zinc, barium, calcium, etc.. Discarded tire rubbers are impervious that trap water, and offer breeding environments for mosquitos, rats, and rodents. Additionally, considerable land areas are consumed by discarded tires while stockpiling and landfilling and turning out to be challenging due to the scarcity of unoccupied lands. Unexpected fires in stockpiled discarded tires are tremendously challenging to control because of the existing highly flammable hydrocarbons. Another treatment method, i.e., re-treading of discarded tires, may adjourn the issue as a transient economical resolution. Therefore, it is high time to introduce scientific and sustainable approaches to renewing discarded vehicle tires. End-of-life cycle tires can be renewed by reconstructing and recovering for stemming energy and engineering materials. The discarded tire rubbers are collected at the end of their life period and renewed to produce in several shapes and sizes. While renewing the discarded tire rubber, the vehicle tire structure is deemed for screening the composing materials to assemble in various classifications. The construction industry has introduced a variety of chemical and mechanical techniques to obtain optimum utilization of discarded tire rubbers. Specifically, there are two techniques to produce rubber aggregates from discarded tires, such as cryogenic grinding and mechanical grinding. These various grinding practices enable the yielding of diverse sizes of rubber particles, and the most frequently employed size ranges from 2 mm to 4 mm. This study focuses on the available methods to renew discarded vehicle tires for the construction industry.