Experimental Study on Hot Bituminous Mix

Abstract

About 80% of paved roads in India are made of flexible pavement, which is made by heating and mixing aggregates and asphalt binders, so warm-mix asphalt is becoming more prevalent these days. Hot mix asphalt typically has a mixing temperature in the range of 100 to 135 °C (Hurley and Prowell, 2005), whereas hot mix asphalt has a mixing temperature of 150 to 180 °C (300 to 350 °F). WMA uses chemical and organic additives and foaming technology to produce asphalt mixes at low temperatures by reducing binder viscosity, making the mix workable without affecting asphalt performance. Energy consumption, global warming, asphalt oxidation hardening, and the total cost of the asphalt industry are reduced by warm-mix asphalt while also creating a better working environment. WMA is produced, placed and compacted at temperatures 10°C to 40°C lower than control hot-mix asphalts (D`Angelo et al., 2008). However, the low blending temperature raises concerns about blend performance. Therefore, WMA blends should be thoroughly evaluated and characterized to ensure adequate performance.