Abstract
In this research, Graphene oxide (GO), prepared by modified hammer method, is characterized using X-ray Diffraction (XRD), Fourier Transform Infrared (FT-IR) Spectrometry and Raman spectra. The dispersion efficiency of GO in aqueous solution is examined by Ultraviolet–visible spectroscopy and it is found that GO sheets are well dispersed. Thereafter, rheological properties, flow diameter, hardened density, compressive strength and electrical properties of GO based cement composite are investigated by incorporating 0.03% GO in cement matrix. The reasons for improvement in strength are also discussed. Rheological results confirm that GO influenced the flow behavior and enhanced the viscosity of the cement based system. From XRD and Thermogravimetric Analysis (TGA) results, it is found that more hydration occurred when GO was incorporated in cement based composite. The GO based cement composite improves the compressive strength and density of mortar by 27% and 1.43%, respectively. Electrical properties results showed that GO–cement based composite possesses self-sensing characteristics. Hence, GO is a potential nano-reinforcement candidate and can be used as self-sensing sustainable construction material.
Highlights
Construction industry plays a vital role in economic development of any country
(5) It reduces structural health monitoring cost: The self-sensing properties of graphene cement based composites detect damages and cracks in the cementitious materials without any additional equipment [6]. (6) It enhances fire resistance: Due to high thermal conductivity of graphene cement composite materials, the behavior of cement based composite against fire is improved [7,8]. (7) It develops ultra-strong composite material: The utilization of super advance high strength composite building material for housing and infrastructure will mitigate damage from cyclones, earthquakes and wildfires, saving lives as well as the resources required for reconstruction
The graphite and Exfoliated graphene oxide nanosheets were characterized by using different techniques such as X-ray Diffraction (XRD), Raman, Fourier transform infrared (FTIR) and EDS
Summary
Construction industry plays a vital role in economic development of any country. Nowadays, concrete is the most widely used construction material (20–35 billion tons annually) [1] in the world, and its use is increasing daily. Graphene is an engineered nanomaterial (two-dimension sheet) which possesses some amazing properties such as huge specific surface area (2630 m2 g−1), high intrinsic strength (130 GPa) and firm Young’s module (~1.0 TPa) [4] It promotes construction sustainability with following potential contributions: (1) It preserves natural resources by significantly enhancing the mechanical properties and using less amount of cement. (7) It develops ultra-strong composite material: The utilization of super advance high strength composite building material for housing and infrastructure will mitigate damage from cyclones, earthquakes and wildfires, saving lives as well as the resources required for reconstruction. Some previous studies have found that graphene nanoplatelets (2D carbon based nanomaterials) are cost competitive and can enhance cement composites strain-sensing and transport properties [10,11] It can be obtained from naturally available graphite flakes (inexpensive source) after chemical oxidation and exfoliation.
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