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Title: | The effects of Nano-Fe2O3 on the mechanical, physical and microstructure of cementitious composites |
Authors: | Najafi Kani, E Rafiean, AH Alishah, A Hojjati Astani, S Ghaffar, SH |
Keywords: | Cementitious composite;Nano-Fe2O3;Mechanical properties;Molecular structure;Microstructure |
Issue Date: | 12-Oct-2020 |
Publisher: | Elsevier |
Citation: | Najafi Kani, E., Rafiean, A.H., Alishah, A., Hojjati Astani, S., Ghaffar, S.H. (2020) 'The effects of Nano-Fe2O3 on the mechanical, physical and microstructure of cementitious composites', Construction and Building Materials, 266, pp. 1 - 9. doi:10.1016/j.conbuildmat.2020.121137. |
Abstract: | In this study, properties of cement composites and mortars were investigated in presence of Nano-Fe2O3 as their modifier. Cement composites were synthesized using the sol-gel method with tetraethylammonium orthosilicate as the complex legend. Subsequently, Nano-Fe2O3 was added at 2, 4, and 6 wt% dosages to the cement composite, while for mortars 2, 3 and 4 wt% of Nano-Fe2O3 dosages were used. FTIR and XRD tests were conducted to analyze the phase composition, molecular, and microstructure of cement composites, additionally, the effects of adding Nano-Fe2O3 on compressive and flexural strengths of mortars were investigated. The results indicated a change in the phase composition of the molecular-structure of cement composites, leading to stronger bonds in silicate network with more ordered arrangement in the presence of nanoparticles. The formation of three-membered silicate rings was also evident in composite samples containing higher amounts of Nano-Fe2O3 (i.e. 4 and 6 wt%). The microstructure analysis revealed that samples with Nano-Fe2O3 had a denser structure with a smaller pore size in comparison with control samples. The mechanical performance of mortar samples were enhanced with the incorporation of Nano-Fe2O3, where 3 wt% dosage was identified as the optimum. |
URI: | http://bura.brunel.ac.uk/handle/2438/24973 |
DOI: | http://dx.doi.org/10.1016/j.conbuildmat.2020.121137 |
ISSN: | 0950-0618 |
Other Identifiers: | 121137 |
Appears in Collections: | Dept of Mechanical and Aerospace Engineering Embargoed Research Papers |
Files in This Item:
File | Description | Size | Format | |
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RevisedManuscript 9.19.2020 (Reviewed by Seyed).docx | Embargoed till Published | 8.91 MB | Microsoft Word XML | View/Open |
FullText.pdf | Embargoed till Published | 2.02 MB | Adobe PDF | View/Open |
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