Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 216, Issue -, Pages 128-136Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2019.04.180
Keywords
Triethanolamine; Graphene oxide; Dispersion; Mechanical behavior; Pore solution; Crack propagation
Categories
Funding
- National Science and Technology Major Project of China [2016ZX05020-004]
- National Natural Science Foundation of China [51874210]
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Re-aggregation of graphene oxide (GO) in cementitious solutions compromises the mechanical enhancement of cement composite. We chemically functionalized GO via triethanolamine (TEA), the removal of -C-O-C- groups on basal planes and the attachment of extra -OH groups on edges promoted its dispersibility during hydration and in cement paste. When incorporated into cement, TEA-GO provides more nucleation sites due to the better dispersion, further promoting the hydration degree. TEA-GO enhanced the compressive strength and flexural strength by 9.4-31% and 8.1-36.7% respectively, which was significantly higher than that of GO(4.1-17.2%; 7.8-20%). (C) 2019 Elsevier Ltd. All rights reserved.
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