Static and Dynamic Mechanical Properties of Graphene Oxide and Fly Ash Based Concrete

Abstract

AbstractGraphene oxide (GO) has been recognized as one of the most potential nanomaterial for reinforcement in cementitious composites due to its extraordinary properties. In the present investigation, the static and dynamic mechanical characteristics of GO and fly ash based concrete (FA-GO-Concrete) have been studied experimentally. The static characteristics have been determined by conducting a compressive strength test and dynamic properties such as fundamental natural frequencies and damping ratios of FA-GO-Concrete beams in free-free conditions were measured using the impact hammer technique. In this paper, the influence of GO addition at 0.15% and variation of fly ash content at 0, 10, 20 and 30% as a replacement of cement was studied. The experimental findings showed that the addition of GO and replacement of fly ash increased the compressive strength and fundamental natural frequencies, whereas reduced the damping ratio of FA-GO-concrete compared to the control concrete. The damping ratios of FA-GO-Concrete increased with fly ash content increment, while the fundamental natural frequencies were reduced with fly ash content increment with respect to the GO-Concrete. The static and dynamic elasticity modulus of FA-GO-Concrete were also determined. It has been found that the desired dynamic properties can be achieved by adding GO and partially replacing the cement with fly ash.KeywordsGraphene oxideFly ashStatic mechanicalDynamic mechanical