estimation of elastic modulus and poisson’s ratio of concrete containing graphene nanosheets: a focus on nano-filler agglomeration and hydration time

In the current study, the influences of adding graphene nanosheets (gnss) on the elastic characteristics of concrete are examined using the mori-tanaka micromechanical model. by the use of the base concrete hydration equation, the role of hydration time in the young’s modulus and poisson ratio of gns-filled concrete is analyzed. also, the formation of gns agglomeration as one of the most major microstructural features of composite materials containing nano-sized particles is considered in the micromechanical simulation. significant contribution of the hydration time to the elastic properties of gns-reinforced concrete is confirmed. generally, the addition of gnss can help to enhance the concrete elastic modulus and decrease the poisson’s ratio. the results show that well-dispersed gnss lead to the enhancement of mechanical performance of the concrete, whereas gns agglomeration causes significant reduction of elastic modulus.