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Materials 2016, 9(11), 952; doi:10.3390/ma9110952

The Effect of Curing Temperature on the Properties of Cement Pastes Modified with TiO2 Nanoparticles

1
Department of Civil, Architectural and Environmental Engineering, University of Miami, Coral Gables, FL 33146, USA
2
Department of Biomedical Engineering, University of Miami, Coral Gables, FL 33146, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Silvia Gross
Received: 19 September 2016 / Revised: 31 October 2016 / Accepted: 15 November 2016 / Published: 23 November 2016
(This article belongs to the Section Structure Analysis and Characterization)
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Abstract

This paper investigates the effect of curing temperature on the hydration, microstructure, compressive strength, and transport of cement pastes modified with TiO2 nanoparticles. These characteristics of cement pastes were studied using non-evaporable water content measurement, X-ray diffraction (XRD), compressive strength test, electrical resistivity and porosity measurements, and scanning electron microscopy (SEM). It was shown that temperature enhanced the early hydration. The cement pastes cured at elevated temperatures generally showed an increase in compressive strength at an early age compared to the cement paste cured at room temperature, but the strength gain decreased at later ages. The electrical resistivity of the cement pastes cured at elevated temperatures was found to decrease more noticeably at late ages compared to that of the room temperature cured cement paste. SEM examination indicated that hydration product was more uniformly distributed in the microstructure of the cement paste cured at room temperature compared to the cement pastes cured at elevated temperatures. It was observed that high temperature curing decreased the compressive strength and electrical resistivity of the cement pastes at late ages in a more pronounced manner when higher levels of TiO2 nanoparticles were added. View Full-Text
Keywords: hydration; cement paste; elevated temperature; TiO2 nanoparticles hydration; cement paste; elevated temperature; TiO2 nanoparticles
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MDPI and ACS Style

Pimenta Teixeira, K.; Perdigão Rocha, I.; De Sá Carneiro, L.; Flores, J.; Dauer, E.A.; Ghahremaninezhad, A. The Effect of Curing Temperature on the Properties of Cement Pastes Modified with TiO2 Nanoparticles. Materials 2016, 9, 952.

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