Enhancing Asphalt Pavement Sustainability: A Review of Magnetite, Crumb Rubber, and Modified Bitumen Application

Abstract: ABSTRACT: This article has reference to exploring the usage of magnetite, bitumen, and rubber crumbs as innovative additives in asphalt pavement materials. By incorporating these materials, the study aims to enhance the durability, performance, and sustainability of road infrastructure.
Therefore, asphalt pavement technology advances for sustainable infrastructure development in South Africa are examined in this research. Secondary sources are reviewed to examine the utilization of new asphalt additives such as magnetite, bitumen, and crumb rubber. The research shows that these compounds improve asphalt's mechanical and thermal qualities, especially in hot temperatures and high-traffic locations. Crumb rubber increases flexibility, durability, and fracture resistance, while magnetite enhances thermal performance due to its electrically conductive properties, facilitating improved heat management in asphalt pavements. These additives make bitumen road surfaces more robust, helping South Africa build long-lasting infrastructure. These materials enhance road performance by improving durability and flexibility, while also contributing to environmental conservation through the recycling of rubber tires, reducing waste and promoting a more sustainable approach to road construction and maintenance.

The study suggests that integrating magnetite, bitumen, and rubber crumbs into asphalt technology could significantly enhance road durability and sustainability, potentially aiding South Africa in developing long-lasting, eco-friendly infrastructure that addresses both performance and environmental challenges.

KEY WORDS: Asphalt pavement, magnetite, rubber crumbs, modified bitumen, sustainability, South Africa