A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Characterisation and modelling of vapour-conditioned asphalt binders using nanoindentation
Nanoindentation tests were conducted on unconditioned and vapour-conditioned asphalt binder samples to determine damage processes by characterising contact creep data and using viscoelastic mechanical models. For vapour-conditioned asphalt binders, a thin film of asphalt binder was prepared on a glass slide and subjected to relative humidity (RH) of 25%, 49% and 71% inside enclosed desiccators using three aqueous solutions: potassium acetate, potassium carbonate and sodium chloride, respectively. Based on the nanoindentation contact creep test data, it was observed that vapour-conditioned asphalt binders showed larger indentation viscous depth than the unconditioned binders. Indentation test data were modelled using viscoelastic mechanical models such as Burgers and Maxwell models. The models showed that elasticity increased and viscosity decreased in the vapour-conditioned asphalt binders. In 71% RH-conditioned binders, elastic components of Burgers model, E1 and E2 increased about 10% and 15%, respectively, compared to the unconditioned binder. The relaxation time decreased about 35% and retardation time increased about 69% in 71% RH-conditioned binders compared to unconditioned binders.
Characterisation and modelling of vapour-conditioned asphalt binders using nanoindentation
Nanoindentation tests were conducted on unconditioned and vapour-conditioned asphalt binder samples to determine damage processes by characterising contact creep data and using viscoelastic mechanical models. For vapour-conditioned asphalt binders, a thin film of asphalt binder was prepared on a glass slide and subjected to relative humidity (RH) of 25%, 49% and 71% inside enclosed desiccators using three aqueous solutions: potassium acetate, potassium carbonate and sodium chloride, respectively. Based on the nanoindentation contact creep test data, it was observed that vapour-conditioned asphalt binders showed larger indentation viscous depth than the unconditioned binders. Indentation test data were modelled using viscoelastic mechanical models such as Burgers and Maxwell models. The models showed that elasticity increased and viscosity decreased in the vapour-conditioned asphalt binders. In 71% RH-conditioned binders, elastic components of Burgers model, E1 and E2 increased about 10% and 15%, respectively, compared to the unconditioned binder. The relaxation time decreased about 35% and retardation time increased about 69% in 71% RH-conditioned binders compared to unconditioned binders.
Characterisation and modelling of vapour-conditioned asphalt binders using nanoindentation
Hossain, Mohammad I. (author) / Faisal, Hasan M. (author) / Tarefder, Rafiqul A. (author)
International Journal of Pavement Engineering ; 16 ; 382-396
2015-05-28
15 pages
Article (Journal)
Electronic Resource
English
asphalt , damage , nanoindentation , vapour , relaxation , retardation
Characterisation and modelling of vapour-conditioned asphalt binders using nanoindentation
| Online Contents | 2015
Review of experimental characterisation and modelling of asphalt binders at low temperature
| Taylor & Francis Verlag | 2018
Fatigue characterisation of modified asphalt binders containing warm mix asphalt additives
| Taylor & Francis Verlag | 2020
| Springer Verlag | 2017
Tribological and rheological characterisation of asphalt binders at different temperatures
| Taylor & Francis Verlag | 2018