Effect of Graphene Nano-sheets on the Chloride Penetration and Microstructure of the Cement Based Composite
In this work,the effects of the non covalent surface modification method on the dispersion of graphene nano-sheets (GNS) in water and chloride diffusion of the cement paste incorporating these dispersions were investigated.Results showed that stable and homogeneous suspensions of graphene nano-sheets were prepared using polyoxyethylene (40) nonylphenylether (CO890) as a dispersant.In this research,water to cement ration is kept 0.30,the addition of GNS is ranging from 0.02% to 0.15% by weight of cement.It is found that introduction small quantities of GNS as little as 0.02% can decrease the chloride penetration depth and coefficient by as much as 37% to 42%,respectively.This improvement could be attributed to the enhanced degree of cement hydration,filling effect,barrier effect and crack-arresting effect of GNS in cement matrix.This work provides a new way to further understand the improvement of GNS in cement composites.
graphene nan-sheets polyoxyethylene (40) nonylphenylether cement paste chloride diffusion microstructure
Baomin Wang Ruying Zhao
Institute of Building Materials, School of Civil Engineering, Dalian University of Technology, Dalian 116024, China
国内会议
中国大坝工程学会水库泥沙处理与资源利用技术专业委员会成立大会
长沙
英文
239-253
2017-11-09（万方平台首次上网日期，不代表论文的发表时间）