Effects of temperature and age on stress relaxation in straight and modified asphalt binders from a northern Ontario pavement trial
Source abstract
Abstract
The effects of temperature and age on stress relaxation were investigated for a set of seven asphalt binders from a northern Ontario pavement trial. It was found that between binders, there were rather wide variations for different modes of relaxation. The first peak in the relaxation spectrum, originating from the rapid relaxation within the mobile saturates domains, was relatively insensitive to ageing. The second and third peaks at higher relaxation times changed more with both laboratory ageing and temperature changes. The straight-run Cold Lake asphalt binder showed the least amount of change, and this can likely explain its superior field performance. High styrene–butadiene (SB and SBS) polymer loadings, the presence of polyphosphoric acid (PPA), or re-refined engine oil bottoms (REOB) all resulted in solid-like behaviour, delayed stress relaxation, and associated reduced lifecycles.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Asphalt Pavement Performance Evaluation · Infrastructure Maintenance and Monitoring · Transport Systems and Technology
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Department of Chemistry, Queen’s University, Kingston, Canada
Department of Civil Engineering, PSG College of Technology, Coimbatore, India
Key Laboratory of Road and Traffic Engineering of Ministry of Education, Tongji University, Shanghai, People’s Republic of China
Department of Civil Engineering, Indian Institute of Technology Madras, Chennai, India
Funding
Alberta Innovates · Imperial Oil of Canada · Ministry of Transportation of Ontario
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