01628596

Component

https://doi.org/10.3141/2632-07

The use of re-refined engine oil bottoms (REOBs) in asphalt pavements is a topic of much debate because the aging susceptibility and quantity of the additive in the binder may affect field performance. In this study, four mixtures with varying REOB contents (up to 15%) were long-term oven aged by using a high-temperature, short-duration method (135°C, 24 h) and compared with existing data on mixtures aged with more conventional short-term and long-term oven-aging procedures. The recovered binders underwent Superpave® grading, double-edge notched tension, and extended bending beam rheometer testing, and the binders were subjected to dynamic modulus, cyclic fatigue testing in the asphalt mixture performance tester, and thermal stress restrained specimen testing. Results showed a general insensitivity when short-term oven-aged (135°C, 4 h) materials were compared with long-term oven-aged (85°C, 5 days) materials, whereas the aging process at 135°C over 24 h resulted in substantial changes to the stiffness and relaxation properties across high-, intermediate-, and low-temperature modes. The difference between the stiffness-based and slope-based low-temperature performance grades appears to be an indicator for REOB modification, with the test for physical hardening of the binder being more sensitive than standard bending beam rheometer testing. The details in this paper provide information for the asphalt pavement community to consider as specifications. Standard practices are developed to address REOB modification.

01656487

17-00736

English

pp 60–69

2017

Transportation Research Record: Journal of the Transportation Research Board

9780309442138

Digital/other

Figures (5) ; References (30) ; Tables (4)

Aging (Materials); Asphalt mixtures; Mechanical relaxation; Oven tests; Rheometers; Stiffness; Temperature

Re-refined engine oil bottoms; Recycled engine oil bottoms; Short-term oven aging

Highways; Materials; Pavements

PRP, TRIS, TRB, ATRI

Dec 8 2016 10:10AM

• Chemical, Microstructural, and Rheological Characterizations of Binders to Evaluate Aging and Rejuvenation
• Development of a Simple Fatigue Cracking Test for Asphalt Binders
• Evaluating Asphalt Binders Prepared with Different Processes to Meet the Same Performance Grade: Use of Atomic Force Microscope
• Evaluating Tack Properties of Trackless Tack Coats Through Dynamic Shear Rheometer
• Evaluation of Adhesion Properties of Modified Asphalt Binders with Use of Binder Bond Strength Test
• Evaluation of Stiffness, Strength, and Ductility of Asphalt Binders at an Intermediate Temperature
• Evolution of the Surface Performance-Graded Specification for Chip Seal Binders
• Influence of Carbon Nanotubes on Morphology of Asphalts Modified with Styrene–Butadiene–Styrene
• Long-Term Field Aging of Warm-Mix and Hot-Mix Asphalt Binders
• Numerical Prediction of Storage Stability of Polymer-Modified Bitumen: A Coupled Model of Gravity-Driven Flow and Diffusion
• Performance-Related Specifications for Asphalt Emulsions Used in Microsurfacing Treatments
• Statistical Analyses of Aggregate Mineral–Binder Adhesion: Measuring with Particle Probe Scanning Force Microscopes
• Systematic Method for Quantifying Re-Refined Engine Oil Bottom Content in Binders: Using X-Ray Fluorescence Spectroscopy
• Validation of a Bitumen Oxidation Rate Model