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dc.contributor.authorWang, D.
dc.contributor.authorDong, S.
dc.contributor.authorWang, X.
dc.contributor.authorAshour, Ashraf
dc.contributor.authorLv, X.
dc.contributor.authorHan, B.
dc.date.accessioned2021-07-21T09:57:39Z
dc.date.accessioned2021-08-12T14:43:51Z
dc.date.available2021-07-21T09:57:39Z
dc.date.available2021-08-12T14:43:51Z
dc.date.issued2021-09
dc.identifier.citationWang D, Dong S, Wang X et al (2021) Investigating the compatibility of nickel coated carbon nanotubes and cementitious composites through experimental evidence and theoretical calculations. Construction and Building Materials. 300: 124340.en_US
dc.identifier.urihttp://hdl.handle.net/10454/18571
dc.descriptionYesen_US
dc.description.abstractNickel coated multi-walled carbon nanotubes (NiMCNTs) are favorable reinforcing nanofillers for modifying cementitious composites due to their preeminent mechanical properties, electrical conductivity, thermal properties and dispersibility. This paper investigates the mechanical properties and compatibility of NiMCNTs filled cementitious composites, having two different types of cement, two water to cement ratios, and two dosages of five types of NiMCNTs. The results show that 0.06 vol.% NiMCNTs with small aspect ratios can significantly enhance the mechanical properties of cementitious composites, while NiMCNTs with large aspect ratios play a better strengthening effect at 0.03 vol.%. The flexural strength/toughness of cementitious composites containing 0.06 vol.% NiMCNTs with an aspect ratio of 200 can be increased by 19.65%/116.78%. Adding 0.03 vol.% NiMCNTs with an aspect ratio of 1000 enhances the compressive strength/toughness of composites by 18.61%/47.44%. Besides, NiMCNTs have preferable compatibility to cementitious composites prepared by P·O 42.5R cement with a water to cement ratio of 0.3. The enhancement mechanism is related to the denser microstructure and effective suppression of microcracks in the cementitious matrix by NiMCNTs with filling, bridging and pull-out effects, as well as the high interface bond strength between NiMCNTs and matrix. A strength prediction model for NiMCNTs reinforced cementitious composites is also established to estimate the mechanical strength of cementitious composites containing NiMCNTs with different aspect ratios/contents, showing a small relative error within ±6%/±13% for predicted flexural/compressive strength values in comparison with the experimental results.en_US
dc.description.sponsorshipFunding supported from the National Science Foundation of China (51908103 and 51978127), and the Fundamental Research Funds for the Central Universities (DUT21RC(3)039).en_US
dc.language.isoenen_US
dc.rights© 2021 Elsevier Ltd. All rights reserved. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.en_US
dc.subjectCementitious compositesen_US
dc.subjectNickel coated multi-walled carbon nanotubesen_US
dc.subjectMechanical propertiesen_US
dc.subjectAspect ratioen_US
dc.subjectWater to cement ratioen_US
dc.titleInvestigating the compatibility of nickel coated carbon nanotubes and cementitious composites through experimental evidence and theoretical calculationsen_US
dc.status.refereedYesen_US
dc.date.Accepted2021-07-20
dc.date.application2021-07-28
dc.typeArticleen_US
dc.type.versionAccepted manuscripten_US
dc.identifier.doihttps://doi.org/10.1016/j.conbuildmat.2021.124340
dc.date.updated2021-07-21T08:57:54Z
refterms.dateFOA2021-08-12T14:44:40Z
dc.openaccess.statusGreenen_US


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