Microstructure, characterizations, functionality and compressive strength of cement-based materials using zinc oxide nanoparticles as an additive

•Nano zinc oxide was used as an additive material.•Microstructure and phase characterization of pastes were characterized using SEM and XRD.•TGA and FTIR were also used to determine the hydration reaction.•Compressive strength of ZnO mixes was found to increase at 28days. Zinc oxide nanoparticles as...

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Bibliographic Details
Published in:Journal of alloys and compounds 2015-05, Vol.630, p.1-10
Main Authors: Nochaiya, Thanongsak, Sekine, Yoshika, Choopun, Supab, Chaipanich, Arnon
Format: Article
Language:English
Subjects:
Additives
Cements
Compressive strength
Hydration
Metals and alloys
Microstructure
Nanoparticles
Oxide materials
Pastes
Portland cements
Scanning electron microscopy, SEM
Thermal analysis
X-ray diffraction
Zinc oxide
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Summary:•Nano zinc oxide was used as an additive material.•Microstructure and phase characterization of pastes were characterized using SEM and XRD.•TGA and FTIR were also used to determine the hydration reaction.•Compressive strength of ZnO mixes was found to increase at 28days. Zinc oxide nanoparticles as a nanophotocatalyst has great potential for self-cleaning applications in concrete structures, its effects on the cement hydration, setting time and compressive strength are also important when using it in practice. This paper reports the effects of zinc oxide nanoparticles, as an additive material, on properties of cement-based materials. Setting time, compressive strength and porosity of mortars were investigated. Microstructure and morphology of pastes were characterized using scanning electron microscope and X-ray diffraction (XRD), respectively. Moreover, thermal gravimetric analysis (TGA) and Fourier-transform infrared spectrometer (FTIR) were also used to determine the hydration reaction. The results show that Portland cement paste with additional ZnO was found to slightly increase the water requirement while the setting time presented prolongation period than the control mix. However, compressive strength of ZnO mixes was found to be higher than that of PC mix up to 15% (at 28days) via filler effect. Microstructure, XRD and TGA results of ZnO pastes show less hydration products before 28days but similar at 28days. In addition, FTIR results confirmed the retardation when ZnO was partially added in Portland cement pastes.
ISSN:0925-8388
1873-4669
DOI:10.1016/j.jallcom.2014.11.043