Journal
MATERIALS EXPRESS
Volume 8, Issue 2, Pages 149-156Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/mex.2018.1421
Keywords
Graphene Nanoplatelets; Cement Paste; Pore Structure; Chloride Migration; Sulfate Corrosion
Funding
- National Natural Science Foundation of China [51578108 51778101]
- Special Fund for scientific Research in the Public Interest, Ministry of Water Resource of the People's Republic of China [201501003]
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The paper presents the effect of graphene nanoplatelets (GNPs) on the pore structure and chloride permeability of cement paste with a water to cement ratio of 0.35. The influence of GNPs on the hydration degree, microstructure and chloride permeability of the cement paste is systematically investigated. The experimental results show that the addition of GNPs refined the pore structure and decreased the chloride migration coefficient. It is clearly indicated that the very low fraction of GNPs (0.1%) can effectively hinder the ingress of chloride ions. Additionally, the sulfate corrosion is also enhanced by GNPs with a moderate of 0.1%. The improvement chloride permeability and is not only attribute to the excellent properties of GNPs itself but also the higher hydration degree, lower porosity and the effect of GNPs such as crack arresting, and barrier effect. It is concluded that GNPs has a great potential for reinforcing the durability of cement paste.
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