The effect of SiO2 nanoparticles derived from hydrothermal solutions on the performance of portland cement based materials

Ismael Flores-Vivian, Rani G.K. Pradoto, Mohamadreza Moini, Marina Kozhukhova, Vadim Potapov, Konstantin Sobolev

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

The nanoparticles of SiO2 were used in cement systems to modify the rheological behavior, to enhance the reactivity of supplementary cementitious materials, and also to improve the strength and durability. In this research, low-cost nano-SiO2 particles from natural hydrothermal solutions obtained by membrane ultrafiltration and, optionally, by cryochemical vacuum sublimation drying, were evaluated in portland cement based systems. The SiO2-rich solutions were obtained from the wells of Mutnovsky geothermal power station (Far East of Russia). The constant nano-SiO2 dosage of 0.25% (as a solid material by weight of cementitious materials) was used to compare the cement systems with different nanoparticles against a reference mortar and a commercially available nano-SiO2. Nanoparticles were characterized by X-Ray Diffraction (XRD), BET Surface Area, Scanning Electron Microscope (SEM) and Fourier Transform Infrared (FTIR) spectroscopy techniques. It was demonstrated that the addition of polycarboxylate ether superplasticizer and the dispersion treatment using an ultrasound processor can be used to facilitate the distribution of nano-SiO2 particles in the mixing water. The effect of nano-SiO2 particles in portland cement mortars was investigated by evaluating the flow, heat of hydration and compressive strength development. It was demonstrated that the use of nano-SiO2 particles can reduce the segregation and improve strength properties.

Original languageEnglish (US)
JournalFrontiers of Structural and Civil Engineering
Volume11
Issue number4
DOIs
StatePublished - Dec 1 2017
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Architecture

Keywords

  • compressive strength
  • cryochemical vacuum sublimation drying
  • heat of hydration
  • nanoparticles
  • portland cement
  • surface area
  • ultrafiltration

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