Journal
ADVANCED SCIENCE
Volume 6, Issue 9, Pages -Publisher
WILEY
DOI: 10.1002/advs.201801195
Keywords
consistency; electrochemically exfoliated graphene; mechanical properties; Portland cement; structural characterization
Categories
Funding
- European Commission through the Graphene Flagship [GA-696656]
- Agence Nationale de la Recherche through the Labex project CSC within the Investissement d'Avenir program [ANR-10-LABX-0026 CSC, ANR-10-120 IDEX-0002-02]
- International Center for Frontier Research in Chemistry (icFRC)
- Polish National Science Center [2015/18/E/ST5/00188, 2016/21/B/ST5/00175]
- Silesian University of Technology
- Department of Structural Engineering [BKM-504/RB6/2017, BKM-547/RB6/2018]
- Embassy of France in Poland
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This study reports on the development of a cementitious composite incorporating electrochemically exfoliated graphene (EEG). This hybrid functional material features significantly enhanced microstructure and mechanical properties, as well as unaffected workability; thus, it outperforms previously reported cementitious composites containing graphene derivatives. The manufacturing of the composite relies on a simple and efficient method that enables the uniform dispersion of EEG within cement matrix in the absence of surfactants. Different from graphene oxide, EEG is found to not agglomerate in cement alkaline environment, thereby not affecting the fluidity of cementitious composites. The addition of 0.05 wt% graphene content to ordinary Portland cement results in an increase up to 79%, 8%, and 9% for the tensile strength, compressive strength, and Young's modulus, respectively. Remarkably, it is found that the addition of EEG promotes the hydration reaction of both alite and belite, thus leading to the formation of a large fraction of 3CaO center dot 2SiO(2)center dot 3H(2)O(C-S-H) phase. These findings represent a major step forward toward the practical application of nanomaterials in civil engineering.
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