01629826

Component

Graphene nanoplatelets (GNPs) have emerged as ideal nanofillers for composite materials. However, the understanding of behavior of cementitious composites with GNPs is still in its infancy. This paper investigates the development of self-sensing GNP-reinforced cement composites using a simple fabrication method that does not require special treating procedures such as ultrasonication and chemical (covalent) treatments for the dispersion of GNPs. The GNPs used in this study have an average thickness of 8 nanometers and a diameter of 25 microns. Standard prismatic mortar specimens containing different GNP concentrations are prepared using three different mixing procedures. In addition, the influence of fly ash on the electrical properties of the GNP-reinforced mortar specimens is assessed. The effects of GNP content on the electrical properties and piezoresistive characteristics of mortar specimens are explored. The resistivity of the specimens is measured using a four-point probe method. The piezoresistive response of GNP-reinforced cement composites is evaluated under cyclic compressive loads.

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

01618707

17-05886

English

16p

2017

Transportation Research Board 96th Annual Meeting

Digital/other

Figures; Photos; References; Tables

Composite materials; Electrical properties; Fly ash

Cement composites; Graphene nanoplatelet; Nanofillers; Piezoresistivity; Self-sensing materials

Highways; Materials

Transportation Research Board Annual Meeting 2017 Paper #17-05886

TRIS, TRB, ATRI

Dec 8 2016 12:22PM