Skip to main content

Research Repository

Advanced Search

Influence of SiO2, TiO2 and Fe2O3 nanoparticles on the properties of fly ash blended cement mortars

Ng, Ding Siang; Paul, Suvash Chandra; Anggraini, Vivi; Kong, Sih Ying; Qureshi, Tanvir Shams; Rodriguez, Claudia Romero; Liu, Qing-feng; �avija, Branko

Influence of SiO2, TiO2 and Fe2O3 nanoparticles on the properties of fly ash blended cement mortars Thumbnail


Authors

Ding Siang Ng

Suvash Chandra Paul

Vivi Anggraini

Sih Ying Kong

Tanvir Shams Qureshi

Claudia Romero Rodriguez

Qing-feng Liu

Branko �avija



Abstract

This study explores the effects of different types of nanoparticles, namely nano-SiO2 (NS), nano-TiO2 (NT), and nano-Fe2O3 (NF) on the fresh properties, mechanical properties, and microstructure of cement mortar containing fly ash as a supplementary cementitious material. These nanoparticles existed in powder form and were incorporated into the mortar at the dosages of 1%, 3%, and 5% wt.% of cement. Also, fly ash has been added into in mortars with a constant dosage of 30% wt.% of cement. Compressive and flexural strength tests were performed to evaluate the mechanical properties of the mortar specimens with different nanoparticles at three curing ages, 7, 14, and 28 days. Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray (EDX) tests were conducted to study the microstructure and the hydration products of the mortars. To elucidate the effects of nanoparticles on the binder phase, additional experiments were performed on accompanying cement pastes: nanoindentation and open porosity measurements. The study shows that, if added in appropriate amounts, all nanoparticles investigated can result in significantly improved mechanical properties compared to the reference materials. However, exceeding of the optimal concentration results in clustering of the nanoparticles and reduces the mechanical properties of the composites, which is accompanied with increasing the porosity. This study provides guidelines for further improvement of concretes with blended cements through use of nanoparticles.

Citation

Ng, D. S., Paul, S. C., Anggraini, V., Kong, S. Y., Qureshi, T. S., Rodriguez, C. R., …Šavija, B. (2020). Influence of SiO2, TiO2 and Fe2O3 nanoparticles on the properties of fly ash blended cement mortars. Construction and Building Materials, 258, Article 119627. https://doi.org/10.1016/j.conbuildmat.2020.119627

Journal Article Type Article
Acceptance Date May 17, 2020
Online Publication Date May 27, 2020
Publication Date Oct 20, 2020
Deposit Date Sep 29, 2020
Publicly Available Date Mar 28, 2024
Journal Construction and Building Materials
Print ISSN 0950-0618
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 258
Article Number 119627
DOI https://doi.org/10.1016/j.conbuildmat.2020.119627
Public URL https://uwe-repository.worktribe.com/output/6726723
Publisher URL https://www.sciencedirect.com/science/article/pii/S0950061820316329

Files




You might also like



Downloadable Citations