ABSTRACT

In line with the growth in road traffic, substantial quantities of used tyre are being discarded annually throughout the world. The current techniques to dispose this giant stockpile of used tyre where it is deposited in landfills. Tyres occupy a great volume of the landfill space, as compaction of the tyres is not possible, and the disintegration is very slow. This result to environmental problems such as, the tyres may accumulate rainwater and in this way will establish insect breeding grounds for mosquitoes (health risk like dengue). In this research used tyres was thoroughly studied to find the potential use of shredded tyre as a filter medium in subsurface drainage layer. Hence, the permeability tests and dry sieve analysis were setup to find the permeability coefficient (k) to fit the filter design criteria. However, since the tyres contain several chemical and metal compositions, Toxicity Characteristics Leaching Procedure (TCLP) tests were demonstrated to investigate the leaching level of recycle-shredded tyre. The result shows, the data obtained from Dry Sieve Analysis and Permeability Test has passing the Filter Performance Criteria which is Permeability Criterion and Retention Criterion. Apart from that, the hazardous constituent or leaching level of shredded tyre has showed the level is below the regulatory limits. From the parameter and data obtained, a conclusion can be made, where the shredded tyre has a promising potential and suitable to be used as filter medium in subsurface drainage layer.

Keywords: shredded tyre, filters in subsurface drainage layer, filters medium, filters performance criteria, retention criterion,permeability criterion