Journal article
Performance evaluation and modification mechanism analysis of asphalt binders modified by graphene oxide
Construction & building materials, Vol.163, pp.880-889
02/28/2018
Handle:
https://hdl.handle.net/2376/121097
Abstract
•GO enhanced the rutting resistance of non-modified and SBS modified binders.•GO has no significant effect on the low-temperature property of binders but increases their crosslinking degree.•The optimal GO contents of non-modified binder and SBS modified binder are different.•The modification mechanisms of GO to non-modified and SBS modified binders are different.
This work presents a laboratory study conducted to evaluate the potential impacts of different graphene oxide (GO) dosages on properties of non-modified binder and SBS modified binder. The effects of GO on viscosity, rheological properties, creep and recovery behavior, cracking resistance, and thermal properties of unaged/RTFO aged binders were characterized respectively. It was demonstrated that the addition of trace amounts of GO (no more than 0.2 wt%) enhanced the paving temperature (120–135 °C) viscosity, high-temperature elasticity and rutting resistance of non-modified/SBS modified binders. The performance improvements were attributed to an increase in the crosslinking degree of the binders induced by the GO. The amount of GO needed to improve the high-temperature performance of the non-modified binder is smaller than that needed for the SBS modified binder. The modification mechanism of GO to non-modified binder includes both chemical reactions and physical blending, whereas it only entails physical blending in the case of SBS modified binder.
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Details
- Title
- Performance evaluation and modification mechanism analysis of asphalt binders modified by graphene oxide
- Creators
- Kefei Liu - School of Civil Engineering, Central South University of Forestry & Technology, Changsha 410004, Hunan, PR ChinaKun Zhang - Department of Civil and Environmental Engineering, Voiland College of Engineering and Architecture, Washington State University, P.O. Box 642714, Pullman, WA 99164, USAXianming Shi - Department of Civil and Environmental Engineering, Voiland College of Engineering and Architecture, Washington State University, P.O. Box 642714, Pullman, WA 99164, USA
- Publication Details
- Construction & building materials, Vol.163, pp.880-889
- Academic Unit
- Civil and Environmental Engineering, Department of
- Publisher
- Elsevier Ltd
- Identifiers
- 99900612703401842
- Language
- English
- Resource Type
- Journal article