Effect of graphene on mechanical properties of cement mortars  

作　　者：曹明莉 张会霞 张聪 

机构地区：[1]School of Civil Engineering, Dalian University of Technology

出　　处：《Journal of Central South University》2016年第4期919-925,共7页中南大学学报（英文版）

基　　金：Project(51102035)supported by the National Natural Science Foundation of China

摘　　要：Functionalized graphene nano-sheets(FGN) of 0.01%-0.05%(mass fraction) were added to produce FGN-cement composites in the form of mortars. Flow properties, mechanical properties and microstructure of the cementitious material were then investigated. The results indicate that the addition of FGN decreases the fluidity slightly and improves mechanical properties of cement-based composites significantly. The highest strength is obtained with FGN content of 0.02% where the flexural strength and compressive strength at 28 days are 12.917 MPa and 52.42 MPa, respectively. Besides, scanning electron micrographs show that FGN can regulate formation of massive compact cross-linking structures and thermo gravimetric analysis indicates that FGN can accelerate the hydration reaction to increase the function of the composite effectively.Functionalized graphene nano-sheets （FGN） of 0.01%-0.05% （mass fraction） were added to produce FGN-cement composites in the form of mortars. Flow properties, mechanical properties and microstructure of the cementitious material were then investigated. The results indicate that the addition of FGN decreases the fluidity slightly and improves mechanical properties of cement-based composites significantly. The highest strength is obtained with FGN content of 0.02% where the flexural strength and compressive strength at 28 days are 12.917 MPa and 52.42 MPa, respectively. Besides, scanning electron micrographs show that FGN can regulate formation of massive compact cross-linking structures and thermo gravimetric analysis indicates that FGN can accelerate the hydration reaction to increase the function of the composite effectively.

关 键 词：functionalized graphene nano-sheets cement mortars mechanical strength microstmcture 

分 类 号：TQ177.62[化学工程—硅酸盐工业]