Electrical conductivity of cement mortar with the addition of graphene

Tatiana Potses,Vladimir Novikov,Sergey Leonovich,Kirill Sergeev,V Tur,N Matweenko

doi:10.1051/matecconf/202135000007

Abstract

With the development of technological innovations in the field of construction, increasing the efficiency of energy-saving materials used, more and more attention is paid to electrically conductive materials. Electrical conductivity studies were carried out on samples of concrete with graphene addition to obtain the current–voltage characteristics of the material. In order to identify the mechanism of the effects of different concentrations of graphene on electrical conductivity, a series of samples with different concentrations of graphene was made. As a result of the research, it was found that the dependence: the resistivity of the materialthe concentration is percolation, the concentration of graphene in the amount of 8% of the mass of cement is the percolation threshold.

Highlights

The scope of application of electrically conductive heating elements made of concrete is quite extensive, it can be as the creation of anti-icing structures of roads, sidewalks, reducing the humidity of underground structures, heating concrete at a young age during construction at a sub-zero temperature, it is important to note that giving electrically conductive properties to structural concrete should be while maintaining the initial strength characteristics of conventional concrete
Graphite, fullerene, carbon nanotubes, carbon fiber, steel microwires and other conductive additives were introduced into concrete
At a graphite concentration of 30%, the strength of concrete is reduced by 10-30 times, which is unacceptable for most applications, so such concrete has not found application

Summary

Introduction

The scope of application of electrically conductive heating elements made of concrete is quite extensive, it can be as the creation of anti-icing structures of roads, sidewalks, reducing the humidity of underground structures, heating concrete at a young age during construction at a sub-zero temperature, it is important to note that giving electrically conductive properties to structural concrete should be while maintaining the initial strength characteristics of conventional concrete. Graphite, fullerene, carbon nanotubes, carbon fiber, steel microwires and other conductive additives were introduced into concrete. At a graphite concentration of 30%, the strength of concrete is reduced by 10-30 times, which is unacceptable for most applications, so such concrete has not found application. From the point of view of ensuring conductivity, it is advisable to use conductive particles with a large elongation - rods, fibers, in a number of works, nanotubes, carbon fiber and other objects with a large elongation were introduced into concrete. The results with carbon nanotubes can be considered successful, since the conductivity was achieved with their insignificant content [1]

Methods

Results

Conclusion