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المؤلفIrshidat, Mohammad R.
المؤلفAl-Nuaimi, Nasser
المؤلفRabie, Mohamed
تاريخ الإتاحة2024-04-17T11:32:22Z
تاريخ النشر2021-02-06
اسم المنشورMolecules
المعرّفhttp://dx.doi.org/10.3390/molecules26040850
الاقتباسIrshidat, 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.
الرقم المعياري الدولي للكتاب1420-3049
معرّف المصادر الموحدhttps://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85101239978&origin=inward
معرّف المصادر الموحدhttp://hdl.handle.net/10576/53952
الملخصThis 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.
راعي المشروعThis research was funded by the Office of Research and Graduate studies at Qatar University under project no. QUST-1-CAM-2019-1.
اللغةen
الناشرMultidisciplinary Digital Publishing Institute (MDPI)
الموضوعCarbon nanotubes
Cement mortar
Fire
Microstructure
Strength
Thermal
العنوانInfluence of carbon nanotubes on phase composition, thermal and post-heating behavior of cementitious composites
النوعArticle
رقم العدد4
رقم المجلد26
dc.accessType Open Access


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