Effect of Morphologically Controlled Hematite Nanoparticles on the Properties of Fly Ash Blended Cement

Pantharee Kongsat; Sakprayut Sinthupinyo; Edgar A O'Rear; Thirawudh Pongprayoon

doi:10.3390/nano11041003

Effect of Morphologically Controlled Hematite Nanoparticles on the Properties of Fly Ash Blended Cement

Nanomaterials (Basel). 2021 Apr 14;11(4):1003. doi: 10.3390/nano11041003.

Authors

Pantharee Kongsat^{1

2}, Sakprayut Sinthupinyo³, Edgar A O'Rear⁴, Thirawudh Pongprayoon^{1

2}

Affiliations

¹ Department of Chemical Engineering, Faculty of Engineering, King Mongkut's University of Technology North Bangkok, Bangkok 10800, Thailand.
² Center of Eco-Materials and Cleaner Technology, King Mongkut's University of Technology North Bangkok, Bangkok 10800, Thailand.
³ Siam Research and Innovation Co., Ltd., Saraburi 18260, Thailand.
⁴ School of Chemical, Biological and Materials Engineering and Institute for Applied Surfactant Research, University of Oklahoma, Norman, OK 73019, USA.

Abstract

Several types of hematite nanoparticles (α-Fe₂O₃) have been investigated for their effects on the structure and properties of fly ash (FA) blended cement. All synthesized nanoparticles were found to be of spherical shape, but of different particle sizes ranging from 10 to 195 nm depending on the surfactant used in their preparation. The cement hydration with time showed 1.0% α-Fe₂O₃ nanoparticles are effective accelerators for FA blended cement. Moreover, adding α-Fe₂O₃ nanoparticles in FA blended cement enhanced the compressive strength and workability of cement. Nanoparticle size and size distribution were important for optimal filling of various size of pores within the cement structure.

Keywords: cement hydration; compressive strength; fly ash blended cement; hematite nanoparticles; workability.

Abstract

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