Abstract
Abstract This paper aims to study the influence of graphene nanoplatelets (GNPs) on chloride binding and chloride migration in cement paste. GNPs were dispersed in cement paste in the form of a GNP solution with the help of gum Arabic powder as a dispersant. The microstructure of cement-based materials was investigated via field-emission scanning electron microscopy (FE-SEM). FE-SEM analysis indicated that GNPs can improve the compactness of the cement paste through its filling effect, bridging, and network effects. Adding 0.10 % GNP content improved the chloride binding by 32 % and reduced chloride migration by 45 %. The addition of GNPs can not only improve chloride binding within cement paste, it can also impede the in-migration of chloride from the outside.
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