Comparative Study of Regular Bitumen Mixture and Crumb Rubber Modified Bitumen Rubber

Abstract

The increasing demand for durable and sustainable road infrastructure has led to the exploration of modified bituminous materials. This study presents a comparative analysis of conventional (regular) bitumen mixtures and crumb rubber modified bitumen (CRMB) mixtures in terms of performance, durability, and environmental impact. Crumb rubber, derived from waste automobile tires, is incorporated into bitumen to enhance its engineering properties while promoting waste recycling.

The research evaluates key parameters such as stability, flow value, resistance to rutting, fatigue life, and temperature susceptibility using standard laboratory tests including Marshall Stability and indirect tensile strength tests. Results indicate that crumb rubber modified bitumen mixtures exhibit improved elasticity, higher resistance to deformation, and better performance under extreme temperature conditions compared to regular bitumen mixtures.

Additionally, the use of crumb rubber contributes to environmental sustainability by reducing landfill waste and promoting resource reuse. However, challenges such as higher initial costs and processing complexity are also discussed. Overall, the study concludes that CRMB mixtures offer a promising alternative to conventional bitumen for enhancing pavement performance and longevity, particularly in regions experiencing heavy traffic loads and variable climatic conditions.