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Improved Interfacial Bonding Strength and Reliability of Functionalized Graphene Oxide for Cement Reinforcement Applications
Author(s) -
Wang Nan,
Wang Shuping,
Tang Luping,
Ye Lilei,
Cullbrand Björn,
Zehri Abdelhafid,
Tebikachew Behabitu Ergette,
Liu Johan
Publication year - 2020
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201904625
Subject(s) - materials science , cement , graphene , composite material , oxide , reinforcement , nanomaterials , bond strength , bonding strength , composite number , resilience (materials science) , reliability (semiconductor) , nanotechnology , adhesive , metallurgy , power (physics) , physics , layer (electronics) , quantum mechanics
Poor bonding strength between nanomaterials and cement composites inevitably lead to the failure of reinforcement. Herein, a novel functionalization method for the fabrication of functionalized graphene oxide (FGO), which is capable of forming highly reliable covalent bonds with cement hydration products, and therefore, suitable for use as an efficient reinforcing agent for cement composites, is discussed. The bonding strength between cement and aggregates was improved more than 21 times with the reinforcement of FGO. The fabricated FGO also demonstrated many important features, including high reliability in cement pastes, good dispersibility, and efficient structural refinement of cement hydration products. With the incorporation of FGO, cement mortar samples demonstrated up to 40 % increased early and ultimate strength. Such results make the fast demolding and manufacture of light constructions become highly possible, and show strong advantages on improving productivity, saving cost, and reducing CO 2 emissions in practical applications.