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AuthorIrshidat, Mohammad R.
AuthorAl-Nuaimi, Nasser
AuthorRabie, Mohamed
Available date2024-04-17T11:32:22Z
Publication Date2021-02-06
Publication NameMolecules
Identifierhttp://dx.doi.org/10.3390/molecules26040850
CitationIrshidat, M. R., Al-Nuaimi, N., & Rabie, M. (2021). Influence of carbon nanotubes on phase composition, thermal and post-heating behavior of cementitious composites. Molecules, 26(4), 850.
ISSN1420-3049
URIhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85101239978&origin=inward
URIhttp://hdl.handle.net/10576/53952
AbstractThis paper experimentally investigates the influence of carbon nanotubes (CNTs) on phase composition, microstructure deterioration, thermal behavior, and residual mechanical strengths of cementitious composites exposed to elevated temperatures. Cement mortars with small dosages of CNTs, 0.05% and 0.2% by weight of cement, were prepared and then heated at 25 °C, 150 °C, 200 °C, 450 °C, and 600 °C for two hours before being tested. The results show positive impact of the CNTs on the hydration process of cement mortar at room temperature and at higher temperatures up to 200 °C. Decomposition of the hydration products is obvious at 450 °C, whereas sever deterioration in the microstructure occurs at 600 °C. The nano reinforcement and bridging effect of the CNTs are obvious up to 450 °C. Thermal behavior characterization shows that CNTs incorporation enhances the thermal conductivity of the unheated and heat-treated mortar specimens. The decomposition of the hydration products needs more heat in the presence of CNTs. Finally, presence of CNTs significantly enhances the residual compressive and flexural strengths of heated mortar specimens for all studied temperatures.
SponsorThis research was funded by the Office of Research and Graduate studies at Qatar University under project no. QUST-1-CAM-2019-1.
Languageen
PublisherMultidisciplinary Digital Publishing Institute (MDPI)
SubjectCarbon nanotubes
Cement mortar
Fire
Microstructure
Strength
Thermal
TitleInfluence of carbon nanotubes on phase composition, thermal and post-heating behavior of cementitious composites
TypeArticle
Issue Number4
Volume Number26
dc.accessType Open Access


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