Comparative Strength of Fibre Reinforced Peat and Clayey-Silt by Using Shredded Scrap-Tire

摘要

The strength comparison of fibre reinforced peat and clayey-silt for the compacted sub-grade by using the fibre reinforcement technique from the scrap tire is presented. The scrap tires are extracted and shredded into a standard size, i.e., rubber-chip, rubber-crumb, rubber-powder and fibre-polyester for the consistency and homogeneity of the design mix. In this study, two types of fibres are used, which are fibre polyester and rubber crumb. The fibres at various designated percentage are mixed with the clayey-silt and peat with the addition of a minimum 5% cement content as a binder to achieve the targeted strength. The specimens were prepared by compacting at the optimum moisture content and maximum dry density. The compacted treated specimens were prepared and air cured for 7 and 28 days in room temperature (23°C to 26°C). In evaluating the strength and durability effect of fibres between the untreated (no fibres) and treated specimens (with fibres and cement), the Unconfined Compression Strength (UCS) and California Bearing Ratio (CBR) tests are executed. The findings indicate that the shear strength increases with the curing period. The addition of fibre-polyester and shredded rubber-crumb exhibits an increment in the contact area and bonding between the fibre reinforced materials and soil particles, which then significantly improved the compressive strength of the design mix.