Journal article
Surface abrasion resistance of high-volume fly ash concrete modified by graphene oxide: Macro- and micro-perspectives
Construction & building materials, Vol.237, p.117686
03/20/2020
Handle:
https://hdl.handle.net/2376/120268
Abstract
•Graphene oxide (GO) was used as a performance enhancer for high volume fly ash (HVFA) concrete.•The admixed GO improved the surface abrasion resistance of HVFA concrete.•GO increased the compressive strength of HVFA concrete by accelerating ash hydration.•Both reacted fly ash particles and GO contributed to the improved tribological properties of HVFA mixture.•The optimal dosage for GO in HVFA concrete was 0.05 wt%.
Recent studies have demonstrated that graphene oxide (GO) can be used as a promising nano-sized additive to improve the mechanical properties and durability performances of cement composites. In this laboratory study, the effect of admixed GO on the properties of high-volume fly ash (HVFA) concrete, especially its surface abrasion resistance, was investigated. Compressive strength, microhardness, and tribological properties of HVFA mixtures were also measured to investigate their possible correlations with the abrasion resistance. The addition of GO (up to 0.1% by weight of cementitious materials) increased the compressive strength at the macro level and friction coefficient at the micro level, both of which could be related to the surface abrasion resistance of HVFA concrete. Microhardness and scratch test results showed that the HVFA mixtures achieved the best performance with GO admixed at 0.05 wt%, which was confirmed by the microstructure investigations by XRD and SEM/EDS. In addition, the agglomeration of GO may occur at a dosage higher than 0.05 wt%.
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Details
- Title
- Surface abrasion resistance of high-volume fly ash concrete modified by graphene oxide: Macro- and micro-perspectives
- Creators
- Sen Du - School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, ChinaYan Jiang - School of Materials Science and Engineering, Tongji University, Shanghai 201800, ChinaJing Zhong - School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, ChinaYong Ge - School of Transportation Science and Engineering, Harbin Institute of Technology, Harbin 150090, ChinaXianming Shi - National Center for Transportation Infrastructure Durability & Life-Extension, Department of Civil and Environmental Engineering, Washington State University, Pullman, WA 99164-2910, USA
- Publication Details
- Construction & building materials, Vol.237, p.117686
- Academic Unit
- Civil and Environmental Engineering, Department of
- Publisher
- Elsevier Ltd
- Identifiers
- 99900612852801842
- Language
- English
- Resource Type
- Journal article