The effect of curing temperature on the properties of cement pastes modified with TiO2 nanoparticles

Karine Pimenta Teixeira, Isadora Perdigão Rocha, Leticia De Sá Carneiro, Jessica Flores, Edward A. Dauer, Ali Ghahremaninezhad

Research output: Contribution to journalArticle

15 Scopus citations

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.

Original languageEnglish (US)
Article number952
JournalMaterials
Volume9
Issue number11
DOIs
StatePublished - 2016

Keywords

  • Cement paste
  • Elevated temperature
  • Hydration
  • TiO nanoparticles

ASJC Scopus subject areas

  • Materials Science(all)

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