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.

کلیدواژه های Estimation of elastic modulus and Poisson’s ratio of concrete containing graphene nanosheets: A focus on nano-filler agglomeration and hydration time:

concrete ، Graphene nanosheet ، Elastic property ، Hydration ، Agglomeration