01698320

Component

This paper presents the flexural fatigue behavior of cement mortar mixed with edge-oxidized graphene oxide (EOGO) which is a new type of low-cost carbon nanomaterial that can reinforce cement hydration products. The compressive and flexural strength of the EOGO cement mortar mixtures are also tested for comparison with the results of fatigue tests. Test results indicate that the cement mortar containing 0.05% of EOGO by weight of cement exhibits the best flexural fatigue performance as well as compressive and flexural strengths. In addition, it is found that the EOGO mixed specimens show faster increase in flexural fatigue strains than the control mixture samples under the sinusoidal cyclic loading. This could imply that EOGO may help preventing or delaying the propagation of internal damage (e.g. micro-crack) in the cement paste in an early fatigue phase, resulting in enhanced flexural ductility of the cement mortar beams. Thus, it is concluded that the EOGO can be used as an additive, with cost competitiveness, for improving the structural fatigue performance of cementitious composites. Keywords: Edge-oxidized graphene oxide (EOGO); Cement mortar; Flexural fatigue; Flexural strain increment; Ductility

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

19-02183

English

6p

2019

Transportation Research Board 98th Annual Meeting

Digital/other

Figures; References

Cement mortars; Fatigue strength; Flexural strength; Nanostructured materials; Oxides

Graphene

Highways; Materials; Pavements

Transportation Research Board Annual Meeting 2019 Paper #19-02183

TRIS, TRB, ATRI

Dec 7 2018 9:52AM