Journal of Materials and Engineering Structures
Volume 12, Numéro 3, Pages 281-294
2025-09-30
Effects Of Waste Turmeric Oil On The Rheology And Structural Performance Of Modified Bitumen
Authors : Patil Dipali . Hedaoo Namdeo .
Abstract
Flexible pavements face continual degradation due to traffic and environmental stresses. Concurrently, waste materials like Waste Turmeric Oil (WTO) pose sustainability challenges. This study explores the WTO as a bio-modifier for VG30 bitumen, aiming to enhance binder performance while addressing waste disposal concerns. WTO-modified binders (WTOMB) were evaluated through physical tests (penetration, softening point, flash point) and rheological tests using a Brookfield viscometer and Dynamic Shear Rheometer (DSR). Results showed that increasing WTO content raised penetration and reduced softening points, indicating improved flexibility. Viscosity decreased by 20–25% at WTO contents above 3%, enhancing workability and reducing mixing temperatures. Short-term aging was simulated using the Rolling Thin Film Oven (RTFO) test, with all samples showing low mass loss and good thermal stability. DSR-based Performance Grade (PG) and Multiple Stress Creep Recovery (MSCR) tests indicated a significant reduction in non-recoverable creep compliance (Jnr) to 1.8 kPa¹ at 3% WTO, identifying it as the optimal dosage for rutting resistance. Although 4% WTO also achieved Jnr < 2.0 kPa¹, benefits plateaued. Recovery results suggested that binders with 1–2% WTOMB are suitable for high-traffic conditions. Overall, WTO effectively enhances the performance and sustainability of bitumen binders, offering a cost-efficient and environmentally responsible solution for flexible pavement construction.
Keywords
Waste oil ; Rutting ; Sustainability ; Rehology
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