A comprehensive analysis of warm mix Asphalt with additives and RTFOT-modified Bitumen

Abstract

This study investigates the influence of various warm mix asphalt (WMA) additives, including Sasobit, Evotherm, and Advera, on the properties of asphalt mixtures. Additionally, it compares the performance of these WMAs with traditional hot mix asphalt (HMA) using two types of bitumen, VG30 and PMB40. The research method includes a systematic analysis of Marshall Stability, Marshall Flow Value, and other parameters across different bitumen contents (4%, 4.5%, 5%, and 5.5%) with and without additives. Additionally, it explores the utilization of HMA and WMA with RTFOT-modified bitumen, emphasizing potential enhancements in strength and durability. The results reveal that Sasobit is the most effective additive, consistently improving both Marshall Stability 50% higher and Flow Value 30% higher in comparison of various asphalt mixes. Evotherm primarily enhances stability 40% Higher compare to Sasobit, while Advera exhibits mixed effects. The findings emphasize Sasobit's significant role in enhancing asphalt performance, especially in achieving a balance between stability and flow resistance. This research contributes valuable insights into optimizing asphalt mix designs, particularly in the context of sustainable and energy-efficient paving technologies & provide guidance for selecting appropriate additives to meet specific project requirements, promoting the development of eco-friendly and durable asphalt pavements.

URN:NBN:sciencein.jist.2024.v12.722