This study aims to characterise fatigue cracking of two types of waste-derived (bio-oil and LDPE) bitumen. Modified Paris’ law and Griffith criterion were proposed to investigate crack propagation and initiation of the bitumen. Results show that the bio-oil delays and the LDPE accelerates crack initiation, and the bitumen itself dominates crack propagation of unaged bitumen. The bio-oil did not take the effects in altering bitumen’s fatigue performance after pressure ageing vessel (PAV) ageing. PAV-aged LDPE modified bitumen is more prone to fatigue crack in crack initiation phase, but it remains the same crack propagation rate as PAV-aged control bitumen.
Bibliographical note© 2020, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Funding: The authors would like to acknowledge the financial support from Marie Skłodowska-Curie Individual Fellowships of EU under EU’s H2020 programme (Grant No. 789551), the National Nature Science Foundation of China (Grant No. 51978229), AIMR Seedcorn Grant from Aston University of Unite Kingdom (Grant No. 201901), and China Postdoctoral Science Foundation funded Project (Grant No. 2015M571928).
- Fatigue cracking
- Waste-derived Bitumen