• 文献标题:   Effect of graphene nano-sheets on the chloride penetration and microstructure of the cement based composite
  • 文献类型:   Article
  • 作  者:   WANG BM, ZHAO RY
  • 作者关键词:   graphene nanosheet, polyoxyethylene 40 nonylphenylether, cement paste, chloride diffusion, microstructure
  • 出版物名称:   CONSTRUCTION BUILDING MATERIALS
  • ISSN:   0950-0618 EI 1879-0526
  • 通讯作者地址:   Dalian Univ Technol
  • 被引频次:   2
  • DOI:   10.1016/j.conbuildmat.2017.12.094
  • 出版年:   2018

▎ 摘  要

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 similar to 37% and similar 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. (C) 2017 Elsevier Ltd. All rights reserved.