Performance Analysis of Concrete Materials for Dam Body Energy Storage Modified by Graphene Oxide

Abstract

This study primarily focuses on the modification of concrete materials by incorporating graphene oxide (GO). The dispersion of GO in concrete was characterized through Fourier transform infrared spectrometer (FTIR) and scanning electron microscopy (SEM), and the ability of concrete specimens with varying GO content to endure mechanical and climate temperature challenges were investigated. Additionally, the energy conversion relationship during uniaxial compressive failure was analyzed. The experimental results show that when the GO content is 0.05 %, the top stress, top strain, ultimate strain, and elasticity modulus increase by 29.54 %, 23.41 %, 61.72 %, and 34.93 %, respectively, relative to the reference concrete. With a GO content of 0.03 %, the GO/recycled cement-based composite material exhibits the greatest strength improvement after 7 days of hydration. At a 0.02 % GO content, the GO/recycled cement-based composite material exhibits the most notable strength enhancement after 28 days of hydration. Relative to conventional concrete, GO substantially boosts the key characteristics of uniaxial compression tests, notably diminishing the rate at which elastic strain energy is discharged, increasing the dissipation energy, decreasing the brittleness, and augmenting the malleability and toughness of concrete. However, efficient dispersion and cost-effective production methods for GO have not yet been achieved, and there are no long-term engineering applications of GO-modified concrete. Further research into GO-modified concrete technologies is recommended to promote the practical application and production of GO-incorporated concrete composites.