01663684

Component

Carbon based nanomaterials (e.g. carbon nanotube and graphene) have received a large attention from cement/concrete fields because of their high mechanical properties and behaviors. Later on, surface functionalization techniques on those nanomaterials have been employed to enhance dispersion of those particles in water solution and/or cement matrix. In this study, the effects of graphene oxide nanoflake (GONF) on cement composite was investigated, and optimum mix designs of GONF-cement composites were investigated from the viewpoint of mechanical performance. Variables investigated in the mix design include GONF content (from 0.01% through 1%), superplasticizer, and mix design method. The mix design method is divided into two methods: (1) Dry-mix design where the GONF is mixed with cement as dry power and (2) Wet-mix design where the GONF solution (with sonication) is mixed with cement. Compressive and flexural strength tests were conducted for all specimens to evaluate mechanical behaviors of those composites. In addition, petrographic analysis using scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS) were performed to evaluate the microstructure and chemical composition of GONF-cement composites. According to compressive and flexural strength test, 0.05% of GONF is an optimum proportioning. A proposed potential mechanism of the interaction between GONF and cement hydration product is suggested.

This paper was sponsored by TRB committee AFN10 Standing Committee on Basic Research and Emerging Technologies Related to Concrete.

18-06047

English

3p

2018

Transportation Research Board 97th Annual Meeting

Digital/other

Cement; Cement additives; Composite materials; Compressive strength; Flexural strength; Mix design; Nanostructured materials

Graphene oxide

Design; Highways; Materials; Pavements

Transportation Research Board Annual Meeting 2018 Paper #18-06047

TRIS, TRB, ATRI

Jan 8 2018 11:34AM